Authorities and scientists are investigating the deaths of large numbers of fish in Lake Pamvotida near Ioannina, northern Greece. Early findings suggest a combination of seasonal biological stress and environmental factors rather than pollution.

The urgency of the issue became strikingly clear in the autumn of 2024, when nearly 500 dusky groupers, brown meagres, and other large fish washed ashore dead along Crete and southern Greece.

However, the ban on swimming has not yet been lifted still awaiting the results of water sample checks.

A week after thousands of dead fish started washing-up around the port of Volos, the Greek government has declared a 'state of emergency' and announced a series of support measures for local businesses.

The Prosecutor has ordered an urgent investigation

In response, the Magnesia Hotel Association in fear of the potentially negative impacts is considering filing a lawsuit against those responsible

Experts attribute the phenomenon to the thousands of tons of water from Lake Karla and the surrounding areas that were released into the Pagasetic Gulf via the stream of Xirias