HOOKLAB was created to turn those observations into structured data.

Developed by Merman Conservation, HOOKLAB is an independent field research project in South Pelion, Greece, exploring how recreational rod-and-line fishing can contribute to better documentation of coastal fish biodiversity.

The idea is not to turn every fishing trip into a scientific survey.

It is to introduce scientific discipline into observations that are already happening.

​From a catch to a field observation.

A fish encounter contains considerably more information than simply the species caught.
Through HOOKLAB, an observation can include:

• species
• total length
• weight
• number of individuals
• fishing method
• bait or lure
• habitat
• depth
• location
• release status
• field notes
• environmental conditions

Together, these fields create a much richer record of what was observed, where it occurred, and under what circumstances.

HOOKLAB can also attach environmental context such as weather, wave conditions and sea-surface information to an observation. These values are treated transparently as contextual or modelled information rather than measurements taken directly at the fishing location.

Where amateur fishing meets scientific integrity

Citizen science becomes valuable when participation is combined with good methodology.

HOOKLAB therefore focuses on structured recording, transparency and responsible interpretation.

An observation is not considered scientifically valuable simply because it has been entered into an app. Its usefulness depends on the quality of the identification, measurements, location information, supporting context and subsequent review.

This distinction is important.

HOOKLAB is designed to preserve observations in a form that can be examined, compared and curated rather than treating anecdotal information as scientific evidence automatically.

That means embracing both the possibilities and the limitations of recreational fishing data.

A digital field tool for anglers

HOOKLAB is designed to work where observations actually happen: on the coast.

The application combines a fish species guide, nearby verifiable community observations from iNaturalist, local environmental information, fisheries reference information, and a structured observation form. Records are stored locally on the user's device and can be exported in CSV or PDF format.

The project also includes practical field features such as offline species information and reminders relating to sensitive or closed periods. Fisheries information is advisory, and anglers remain responsible for checking current official Greek and European regulations.

The objective is to make careful documentation practical rather than burdensome.

Why recreational fishing data matters

Scientific monitoring cannot be everywhere at once.

Researchers typically work within defined surveys, sampling periods and budgets.

Recreational anglers, meanwhile, repeatedly interact with marine environments across different seasons, weather conditions and coastal locations.

That does not make recreational fishing a replacement for formal scientific surveys.

It does create an opportunity.

When observations are collected consistently and interpreted carefully, they may help reveal patterns worth investigating: changes in species occurrence, size distributions, seasonality, habitat associations or unusual records.

HOOKLAB explores how that observational potential can be captured responsibly.

Building a better relationship between fishing and conservation

Fishing and marine conservation are sometimes presented as opposing interests.

HOOKLAB starts from a different position.

An angler can also be an observer.
A fishing trip can also generate biodiversity information.
A released fish can still contribute a valuable record.
And people who spend substantial time beside the sea can become active participants in understanding the ecosystems they use.

The project therefore aims to encourage a culture of observation, measurement, documentation and responsible interaction with marine wildlife.

Data with purpose

HOOKLAB observations are curated by the project and may, where appropriate, contribute to scientific research and conservation work.

The long-term value lies not in accumulating the largest possible number of records, but in building a dataset whose origins, context and limitations are understood.

That is the principle behind HOOKLAB:
fish carefully, observe closely, record consistently and make the information useful.

HOOKLAB is a Merman Conservation field research project currently focused on Katigiorgis, Mourtias and the wider South Pelion coastline.
​
Explore the project:
https://hooklab.mermanconservation.co.uk/

​On August 9, 2026, our team documented marine biodiversity at Katigiorgis in South-east Pelion, Greece, using a different survey approach from our usual shallow-water marine bioblitzes.

Rather than surveying species directly underwater, observations were made alongside small traditional coastal fishing boats as they returned to Katigiorgis from fishing grounds in deeper water. Marine organisms brought up in the fishing nets were documented as the catch was sorted, with many non-target species subsequently released back into the sea.

Some of the organisms recorded had been brought to the surface from fishing grounds reaching approximately 100 metres in depth. This provided an opportunity to document species that are less frequently encountered during our shallow coastal surveys and offered a glimpse into the biodiversity associated with deeper marine habitats off South-east Pelion.
The observations included fishes, crustaceans, echinoderms, molluscs, anemones, bryozoans and algae.

Fish

• Scorpaena porcus (Black Scorpionfish) - common in the area's shallow waters.
• Symphodus mediterraneus (Axillary Wrasse) - common in the area's shallow waters.
• Torpedo sp. (Electric Ray)

Crustaceans

• Dardanus calidus (Red Hermit Crab)
• Maja crispata (Lesser Spider Crab)

Anemones

• Calliactis parasitica (Parasitic Anemone)

Molluscs

• Pecten jacobaeus (Pilgrim's Scallop)

Echinoderms

• Echinaster sepositus (Mediterranean Red Sea Star) - common in the area's shallow waters.
• Sphaerechinus granularis (Violet Sea Urchin)

Bryozoans

• Schizoporella errata (Branching Bryozoan)

Algae

• Peyssonnelia sp.

Several of the species were observed alive after being removed from the nets and, where possible, were released back into the sea.

These observations highlight the biodiversity that can be encountered through cooperation with small-scale traditional fishers. While this type of opportunistic survey differs from a standard underwater biodiversity assessment and does not provide a complete representation of the deeper-water community, it can contribute valuable records of species that are otherwise difficult to observe directly.
​
Continued collaboration with local fishing communities can complement coastal biodiversity surveys and help build a broader picture of marine life across different depths and habitats in South-east Pelion.

Wildlife rescue and rehabilitation centres manage complex information every day. Each admitted animal may require identification, clinical assessment, medication, feeding schedules, photographs, laboratory results, progress notes, staff coordination and, eventually, release or mortality records.

When this information is spread across paper forms, spreadsheets, messages and separate files, it becomes difficult to maintain a complete and reliable history for every animal.

To help address this challenge, we created WildCare: Wildlife Rescue & Rehabilitation Management System.

WildCare is a free, open and adaptable digital platform designed to help wildlife rescue centres organise animal care, clinical information, daily tasks and reporting in one place.

What is WildCare?

WildCare is a database-driven management system for wildlife first-aid and rehabilitation centres. It supports both the day-to-day work of staff and volunteers and the more detailed requirements of veterinarians, scientists and centre managers.

The system creates a complete case file for every admitted animal and connects that record with treatments, progress updates, imaging, documents, photographs and daily care schedules. It can also publish selected rescue statistics for supporters and members of the public.

Complete animal case records

Every animal admitted to the centre receives a unique case number.
The record can include:

• Common and scientific species names
• Genus and family
• Sex and age class
• Weight
• Admission date and reason
• Location where the animal was found
• Finder information
• Current rehabilitation status
• Photographs
• Clinical notes
• Release or mortality information
• Administrator-defined custom fields

Species can be selected through iNaturalist taxonomy autocompletion, helping centres maintain consistent scientific names and avoid spelling differences between users.

Medical and rehabilitation records

WildCare keeps clinical information connected to the individual animal record.
Users with the appropriate permissions can add:

• Medications and treatments
• Dosage, route, frequency and duration
• Dated progress notes
• Rehabilitation milestones
• Radiographs and findings
• Laboratory results
• Necropsy reports
• Certificates, permits and supporting documents

The system also maintains a history of changes, showing who updated the record and when.

A complete medical dossier can be exported as a PDF for veterinary clinics, authorities, partner organisations or receiving facilities.

Daily feeding, medication and care schedules

The daily programme converts each animal’s care plan into practical tasks for staff and volunteers.
For a selected date, the centre can organise:

• Feeding schedules
• Medication times
• Assigned staff members or volunteers
• Dosages and instructions
• Completion tracking
• Printed daily programmes
• PDF schedules
• Email distribution to the people on duty

When a task is completed, WildCare records who completed it and at what time. This creates a clearer and more accountable daily workflow.

Roles and permissions

WildCare includes four main user roles:

1. Super Admin
   Controls the full system, including user approvals, roles, permissions, backups and settings.
   
   
2. Admin
   Suitable for centre managers and lead veterinarians.
   
   
3. Member
   Suitable for veterinary staff, biologists and permanent personnel.
   
   
4. Volunteer
   Provides access to assigned tasks, daily schedules and new admission registration without exposing administrative settings or sensitive system functions.
   
   

Permissions can be adjusted in detail, allowing each centre to decide which roles can edit treatments, upload files, manage settings or access particular records.

Reporting, exports and backups

WildCare supports data portability so that centres are not locked into a single system.

The platform includes:

• CSV and Excel imports
• CSV exports
• Individual medical PDF exports
• Google Sheets links
• Google Drive backups
• Preview-before-restore functionality
• Audit records for backups, restores and important system actions

This allows organisations to move existing records into WildCare, continue using established spreadsheets during a transition period and maintain independent backups of their information.

Built for privacy and responsible access

Wildlife rescue records can include sensitive personal and clinical information.

WildCare therefore uses role-based access, approval controls, private file storage and row-level database security. Unapproved users cannot access clinical data, while public statistics provide aggregated totals without exposing animal, finder or user information.

The platform also records important changes and system events in an audit history that ordinary users cannot alter.

English and Greek interface

WildCare currently includes both English and Greek.

Each user can select their preferred interface language, and the system can be expanded with additional languages by adapting the translation files.

This makes the platform suitable for local teams, international partnerships and rescue centres with multilingual staff or volunteers.

Open for everyone to copy and use

WildCare was designed to be adapted, not restricted to one organisation.

Any wildlife rescue or rehabilitation centre can copy the project and create an independent version with its own database and published address.

Centres can change:

• Their name and logo
• Colour palette
• Languages
• Clinical fields
• User permissions
• Public statistics
• Existing admissions data
• Backup settings

The clinical structure is deliberately flexible so that each organisation can adapt the system to its own protocols, species, staff structure and operational needs.

Why we created WildCare?

Wildlife rehabilitation depends on accurate information, clear communication and coordinated care.

A missed medication, incomplete record or unclear handover can affect both animal welfare and scientific reporting. At the same time, many rescue centres operate with limited staff, volunteers and financial resources.

WildCare was created to make professional digital organisation more accessible.

It is not intended to replace veterinary expertise or the centre’s established protocols. It is a practical tool that can support those protocols by keeping information connected, structured and available to the right people.

Better organisation for better wildlife care

WildCare brings animal records, treatments, schedules, staff responsibilities, reports and backups into one system.

Its purpose is simple:
to help wildlife rescue centres spend less time searching for information and more time caring for animals.

WildCare is free, open and ready for rescue centres to copy, customise and use.
​
Open system. Shared knowledge. Better care for wildlife.

https://wildcare.mermanconservation.co.uk/​

On July 21, 2026, our team conducted a marine survey bioblitz at Theotokos in South-east Pelion, Greece. The survey explored shallow rocky shores and nearshore habitats, recording fish, sponges, anemones, molluscs, echinoderms, crustaceans, algae, and coastal birds.

A total of 32 taxa were recorded during the survey, including 26 identified to the species level, 2 to the genus level, and 1 to the suborder level.

Fish

• Epinephelus marginatus (Dusky Grouper)
• Boops boops (Bogue)
• Coris julis (Mediterranean Rainbow Wrasse)
• Symphodus rostratus (Pointed-snout Wrasse)
• Atherina sp.
• Blennioidei (Blennies)
• Diplodus vulgaris (Common Two-banded Seabream)
• Apogon imberbis (Mediterranean Cardinalfish)
• Symphodus tinca (East Atlantic Peacock Wrasse)
• Serranus scriba (Painted Comber)
• Serranus cabrilla (Comber)
• Oblada melanurus (Saddled Seabream)
• Chromis chromis (Mediterranean Damselfish)
• Thalassoma pavo (Ornate Wrasse)
• Diplodus sargus (White Seabream)
• Sarpa salpa (Salema Porgy)
• Mullus surmuletus (Striped Red Mullet)

Sponges

• Tethya aurantium (Golf Ball Sponge)
• Chondrilla nucula (Potato Sponge)
• Sarcotragus spinosulus (Black Leather Sponge)
• Chondrosia reniformis (Kidney Sponge)

Anemones

• Aiptasia mutabilis (Trumpet Anemone)

Molluscs

• Stramonita sp.
• Tarantinaea lignarius

Echinoderms

• Holothuria sanctori (Variable Sea Cucumber)
• Arbacia lixula (Black Sea Urchin)

Crustaceans

• Percnon gibbesi (Nimble Spray Crab)
  
  

Algae and marine plants

• Codium fragile (Dead Man’s Fingers)
• Dictyota dichotoma (Forked Ribbons)
• Padina pavonica (Peacock’s Tail)

Coastal birds

• Gulosus aristotelis (European Shag)

​How Fast Can an Alien Species Establish in the Mediterranean Through the Suez Canal?
​
The Suez Canal is much more than a shipping route. Since opening in 1869, it has also connected two previously separated marine ecosystems: the Red Sea and the Mediterranean.

This has allowed hundreds of non-native organisms, often called alien species or Lessepsian migrants, to enter Mediterranean waters. But how quickly can one of these species establish and spread?

The short answer is: sometimes within a decade, although spreading across much of the Mediterranean usually takes several decades.

Arrival is not the same as establishment

A species must pass through several stages before it becomes established:

1. Arrival: individuals, eggs or larvae enter through the canal.
2. Survival: They tolerate Mediterranean temperatures, salinity, food availability, and predators.
3. Reproduction: A sufficiently large population begins reproducing successfully.
4. Establishment: The population becomes self-sustaining.
5. Expansion: It spreads to new coastlines and islands.

Many species arrive but disappear without forming permanent populations. An alien species is only considered established when it can maintain a population without repeated arrivals from its native range.

Also, not every alien species becomes invasive. That term is generally reserved for established species that spread and cause ecological, economic, or human-health impacts.

What does the research show?

A 2024 study examined 772 historical records involving 130 non-indigenous fish species that entered the Mediterranean through the Suez Canal.

The researchers found that:

- More than half of the introduced fish became established in less than 10 years.
- The first major movement beyond the initial detection region took approximately four years.
- Subsequent geographical expansion occurred in steps averaging about 2.5 years.
- Reaching the central Mediterranean from Suez took approximately 21.5–22 years.
- The dominant direction of expansion was northward and then westward, passing through the Levant, southern Turkey, Cyprus, Greece, and eventually the central Mediterranean.

These figures describe broad historical patterns rather than a timetable that applies to every species.

Read the Scientific Reports study: https://www.nature.com/articles/s41598-024-57109-8.

How quickly can a species reach Greece?

Southern Greece, especially Rhodes, Crete, and the southeastern Aegean, is one of the first European regions encountered by species expanding northwest from the Levant.

For a relatively mobile fish, reaching southern Greek waters can take roughly 10–15 years after the beginning of a successful, detectable expansion. Slower species may require several decades.

Lionfish provide a striking example. Genetic and observational evidence indicates that Mediterranean lionfish spread from the Red Sea through the Suez Canal, established in the Levant, and then expanded through Cyprus, Turkey, and Rhodes using a stepping-stone pattern. Their appearance across these locations over relatively short intervals demonstrates how quickly a suitable, mobile species can expand.

Read the lionfish study: https://www.nature.com/articles/s41598-017-07326-1.

Other organisms move much more slowly. The tropical seagrass Halophila stipulacea, for example, was first reported in Rhodes approximately 25 years after the Suez Canal opened.

Review its Mediterranean invasion history: https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2020.00300/full.

Why are some species much faster?

Several factors determine the speed of establishment and expansion.

Mobility and reproduction

Fast-swimming fish and species with widely dispersed larvae can cover large distances. Species that reproduce early, produce many offspring, or spawn several times per year can establish more rapidly.

Sea temperature

Many Suez migrants originate in warm tropical or subtropical waters. The eastern Mediterranean is warmer than the western and northern parts of the basin, making it easier for heat-loving species to establish there.

Continued warming can make areas farther north and west more suitable, although temperature is not the only controlling factor.

Currents and connected habitats

Ocean currents can transport eggs, larvae, and drifting organisms. Continuous rocky coastlines, seagrass beds, or other suitable habitats act as stepping stones between populations.

Unsuitable habitat can slow or stop expansion even when two locations are geographically close.

Shipping

Ships can transport organisms in ballast water or on their hulls. This can produce long-distance jumps between ports, allowing a species to bypass the slower process of natural coastal expansion.

Detection delays

The first scientific record is rarely the exact moment a species arrived. Small populations can remain unnoticed for years, particularly in poorly monitored areas. Reported expansion times therefore combine biological spread with differences in monitoring and detection.

A realistic Mediterranean timeline

A simplified scenario might look like this:

- 0–4 years: Passage through Suez and initial establishment in the southeastern Mediterranean.
- 5–10 years: Expansion along the Levant, Egypt, Cyprus or southern Turkey.
- 10–15 years: Arrival in parts of southern Greece for faster-moving species.
- Approximately 20–25 years: Expansion into the central Mediterranean around Sicily, Malta, Tunisia or southern Italy.
- 30 years or more: Wider expansion toward the western Mediterranean.

Ship-assisted transport could shorten these times dramatically, while unsuitable habitat or reproductive failure could prevent establishment altogether.

 Why early monitoring matters

By the time an alien species is abundant and widely recognized, eradication may already be impossible. Monitoring near the Suez Canal, the Levant, Cyprus, southern Turkey, and southeastern Greece can provide an early warning before a species expands across the basin.

Fisher observations, citizen-science reports, environmental DNA sampling, and coordinated regional databases can all help detect new arrivals sooner.

The central lesson is that the process is not always slow. A successful alien fish may establish itself in less than a decade and reach Greece within roughly 10–15 years. Expansion into the central and western Mediterranean usually takes longer, but shipping, warming seas, and highly mobile life stages can accelerate the journey.

Use the interactive simulation below to compare slow, moderate, and fast-spreading species and explore how habitat suitability and ship-assisted movement change the timeline.

Protecting wildlife is not always about large conservation projects or expensive infrastructure. Sometimes, one of the most effective conservation tools is simply providing the right information in the right place.

This week, Merman Conservation installed two new awareness signs at Liri Beach in South-east Pelion, Greece. Their purpose is straightforward: to inform visitors that they are entering an area used by the Mediterranean monk seal (Monachus monachus), one of the world's rarest and most endangered marine mammals.

Why Information Matters

Most people who visit the beach want to enjoy nature without causing harm. However, many simply do not know that monk seals may be resting, swimming, or using nearby coastal caves.

By making this information visible, visitors can make informed choices that reduce unnecessary disturbance before it happens.

The signs encourage everyone to:

• Keep a respectful distance if a seal is observed.
• Stay quiet and avoid unnecessary noise.
• Never approach, feed, or attempt to touch a seal.
• Keep dogs under control and on a leash.
• Avoid entering nearby sea caves that may be important resting or breeding sites.
• Refrain from flying drones over the area.

These are simple actions, but together they can significantly reduce human disturbance.

Prevention Is Better Than Reaction

Wildlife conservation often focuses on responding after problems occur. Yet prevention is usually more effective, less costly, and better for both people and wildlife.

Educational signs are a practical example of preventive conservation. They create awareness before disturbance occurs, helping visitors become active participants in protecting sensitive habitats rather than unintentionally harming them.

When people understand why an area is important, they are far more likely to respect it.

Every Visitor Can Contribute

The future of the Mediterranean monk seal does not depend only on governments, scientists, or conservation organisations. It also depends on thousands of everyday decisions made by visitors, swimmers, boaters, photographers, and local communities.

Respecting wildlife requires no special equipment or expertise. It simply requires awareness and consideration.

Action Is Better Than Doing Nothing

Installing two signs will not solve every conservation challenge facing the Mediterranean monk seal. However, doing something meaningful is always better than doing nothing.

Conservation is built from many small actions that work together over time. Every informed visitor, every respectful encounter, and every disturbance that never happens contribute to creating a safer environment for this remarkable species.

At Merman Conservation, we believe that conservation begins with knowledge. By helping people understand the wildlife around them, we create opportunities for everyone to become part of the solution.
​
Sometimes, protecting one of the world's most endangered marine mammals starts with something as simple as reading a sign.

The first half of 2026 has already been an important period for the Greek Shark Logbook, with 40 shark observations recorded from 1 January to 30 June 2026.

These records do not show something “new” or unnatural happening in Greek waters. Sharks have always been part of the marine biodiversity of Greece and the wider Mediterranean. What is changing is that more people are now recording, photographing, and reporting them.
This is exactly why the Greek Shark Logbook exists: to collect verified observations, organise them in a structured database, and help the public, researchers, media and authorities better understand shark presence in Greece.

40 observations in six months.

From January to June 2026, the Greek Shark Logbook recorded observations from several parts of Greece, including the Ionian Sea, the Corinthian Gulf, the Saronic Gulf, the Aegean Sea, Crete, the Pagasetic Gulf, the Dodecanese, and northern Greece.

The records included nine shark species:

• Prionace glauca (Blue shark)
• Isurus oxyrinchus (Shortfin mako)
• Mustelus mustelus (Common smooth-hound)
• Hexanchus griseus (Bluntnose sixgill shark)
• Galeorhinus galeus (Tope shark)
• Carcharhinus plumbeus (Sandbar shark)
• Carcharodon carcharias (Great white shark)
• Scyliorhinus stellaris (Nursehound)
• Squalus blainville (Longnose spurdog)

The most frequently recorded species during this period was the blue shark, with 17 observations. This is not surprising, as blue sharks are naturally present in Greek waters and are often seen seasonally, especially when individuals approach coastal areas.

The second most recorded species was the shortfin mako, with 9 observations. Other records included smooth-hounds, sixgill sharks, tope sharks, and single observations of rarer or less frequently reported species.

More records do not automatically mean more sharks.

One of the most important messages from the 2026 data is this:
More observations do not necessarily mean that there are suddenly more sharks in Greece.

It often means that more people are noticing them, filming them, sharing them online, and reporting them to citizen science projects.

In the last few years, smartphones, social media, action cameras, fishing groups, and local news pages have made wildlife observations much more visible. A shark that may have gone unnoticed or undocumented 20 years ago can now be photographed, uploaded, and discussed within minutes.

This visibility is useful, but it can also create unnecessary fear when sightings are presented without context.

The Greek Shark Logbook helps separate observation from exaggeration. It allows records to be checked, organised and mapped rather than lost in social media posts, rumours or sensational headlines.

Fishermen are becoming more involved.

A very positive development is the increasing participation of fishermen.

Fishermen are often the first people to encounter sharks at sea. Their contribution is extremely valuable because they can provide practical information that is often missing from public posts, such as location, date, depth, fishing method, approximate size, condition of the animal, and whether it was released.

In the 2026 dataset so far, 20 out of 40 observations were linked to fishing activity. This shows how important the fishing community is becoming for shark monitoring in Greece.

This also follows a wider trend already seen in the Greek Shark Logbook: fishermen’s participation has been increasing over time, from 5.9% of records in 2024 to 15.8% in 2025 and around 20.7% so far in 2026.

This is a major step forward. When fishermen participate directly, the data become stronger, more accurate, and more useful for conservation.

Why does this matter?

Sharks are often discussed only through fear, attacks, or sensational media stories. In reality, they are part of the natural marine ecosystem, and many species are threatened or vulnerable because of fishing pressure, bycatch, habitat degradation, and slow reproduction.

For Greece, better shark data are important because they can help us understand:

• where different species are being observed,
• which species are appearing more often in public records,
• which areas produce repeated observations,
• how often sharks are caught, stranded or seen swimming near the coast,
• and how citizen science can support long-term biodiversity monitoring.

The Greek Shark Logbook is not only a sightings map. It is a growing evidence base.

From fear to knowledge.

Every shark observation should be treated carefully, but not with panic.
Seeing a shark in Greek waters does not mean that the sea is unsafe. It means that Greece still has important marine wildlife, including species that have existed in the Mediterranean long before modern tourism, social media, or news headlines.

The real challenge is not to create fear. The challenge is to collect better information.

For every observation, the most useful details are:

1. date,
2. location,
3. photo or video,
4. species if known,
5. estimated size,
6. condition of the animal,
7. and how it was observed.

These details help transform a simple sighting into useful biodiversity data.

A stronger network for Greek shark records.

The first half of 2026 shows that the Greek Shark Logbook is growing. More observations are being collected, more areas are being represented, and more fishermen are participating.
This is important for science, conservation, and public education.

Sharks in Greece should not be treated as monsters, rumours or clickbait. They should be recorded, studied and understood as part of the country’s marine biodiversity.

The message from the first half of 2026 is clear:
​
Sharks are present in Greek waters, people are reporting them more often, and with the help of fishermen, citizens, and local communities, Greece can build a much stronger picture of its shark biodiversity.

On June 27, 2026, our team conducted a marine survey bioblitz, exploring the coastal habitats of Platanias and Mikro in South-east Pelion, Greece. The survey recorded a wide range of marine life from shallow rocky shore, sandy seabed, and nearshore habitats, including fish, sponges, corals, anemones, molluscs, sea slugs, echinoderms, hydroids, marine worms, and algae.

A total of 25 marine taxa were recorded during the survey, including 23 identified to species level and 2 identified to genus level.

​Fish

• Sphyraena sp.
  Recorded at Platanias
• Diplodus annularis (Annular Seabream)
  Recorded at Platanias
• Bothus podas (Wide-eyed Flounder)
  Recorded at Mikro
• Dactylopterus volitans (Flying Gurnard)
  Recorded at Platanias and Mikro
• Chelon sp.
  Recorded at Mikro
• Belone belone
  Recorded at Mikro
• Lithognathus mormyrus (Striped Seabream)
  Recorded at Mikro
• Parablennius zvonimiri (Zvonimir’s Blenny)
  Recorded at Platanias
• Oblada melanurus (Saddled Seabream)
  ​Recorded at Platanias

Sponges

• Sarcotragus spinosulus (Black Leather Sponge)
  Recorded at Mikro
• Aplysina aerophoba (Gold Sponge)
  Recorded at Platanias

Cnidarians, corals, anemones, and hydroids

• Pennaria disticha (Christmas Tree Hydroid)
  Recorded at Mikro
• Parazoanthus axinellae (Yellow Cluster Anemone)
  Recorded at Mikro
• Cladocora caespitosa (Cushion Coral)
  Recorded at Mikro
• Anemonia viridis (Snakelocks Anemone)
  Recorded at Platanias

Molluscs and sea slugs

• Cratena peregrina (Wandering Cratena)
  Recorded at Mikro
• Calmella cavolini
  Recorded at Mikro
• Thuridilla hopei
  Recorded at Platanias
• Mytilus galloprovincialis (Mediterranean Mussel)
  Recorded at Platanias

Echinoderms

• Echinaster sepositus (Mediterranean Red Sea Star)
  Recorded at Platanias and Mikro
• Holothuria tubulosa
  Recorded at Platanias

Marine worms

• Protula tubularia (Red-spotted Horseshoe)
  Recorded at Platanias

Algae

• Codium fragile (Dead Man’s Fingers)
  Recorded at Mikro
• Asparagopsis taxiformis (Red Sea Plume)
  Recorded at Mikro
• Acetabularia acetabulum (Mermaid’s Wine Glass)
  Recorded at Platanias

Since the start of the Greek Shark Logbook, our project has continued to evolve. What began as a way to collect and organise shark observations is gradually becoming a stronger bridge between science, local knowledge, and the people who encounter sharks at sea.

Most of our shark observations still come from social media, but we are encouraged to see that reports from fishermen are increasing year by year:

In 2024, 5.9% of records came from fishermen.
In 2025, this increased to 15.8%.
In 2026, so far, fishermen reports have reached 20.7%.

This progress is very important to us.

Fishermen spend countless hours at sea and hold valuable knowledge about marine life, shark presence, behaviour, and seasonal patterns. By working together, we can improve the quality of our data and build a clearer picture of the open data of shark species in Greek waters.

For every observation, we do our best to contact each observer directly and collect as much detail as possible, including location, date, length, photos or videos, and any other relevant information. All records are stored carefully in our database.

We are grateful to everyone who has contributed so far, from members of the public to fishermen, divers, researchers, and coastal communities.

Our goal is simple: better data, better understanding, and better protection for sharks in Greece.

If you are a fisherman and have seen or accidentally caught a shark,