Maria Salomidi

"For years, we've been witnessing the decline, but it has reached alarming levels over the past decade. Climate change and the proliferation of invasive species are exacerbating the situation.

Marine experts are sounding the alarm over the gradual collapse of fundamental ecosystems in Greece's seas. 

According to Maria Salomidi, a researcher at the Hellenic Center for Marine Research, 60% of underwater algae forests on reefs have already been lost in Greece.

There are ghosts in the ocean. Silent killers carried by the currents, wrapping themselves around reefs and claiming the lives of millions of marine creatures great and small, from sponges and tiny crustaceans to dolphins, sharks and whales.