At the Heart of the Mauve Stinger Bloom at Milina (Greece) | Observation from June 18, 2025

© Chris Taklis - Pelagia noctiluca

Our team at Merman Conservation Expeditions Ltd. recorded a striking jellyfish bloom yesterday afternoon in the Pagasetic Gulf. In the waters just off Milina, more than 30 mauve stingers (Pelagia noctiluca) were observed gathering approximately 20 meters from the beach, while swimmers were still enjoying the sea.

This local observation appears to be part of a wider bloom event that is now expanding beyond the Pagasetic Gulf toward northern Evia and parts of the Sporades. The density and behavior of the jellyfish suggest that this bloom may continue to spread in the coming days.

The mauve stinger is a well-known species in the Mediterranean, recognizable for its translucent body with pink or purple markings and its bioluminescent glow. Although small, it can deliver a painful sting and occasionally forms dense swarms that impact both swimmers and fisheries.

We will continue to monitor the bloom and provide updates as its extent becomes clearer. Events like this remind us how dynamic and unpredictable marine ecosystems can be, especially during the warmer months.
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Stay informed and stay mindful when entering the sea.