Corals cleaned from mucilage in Istanbul on the occasion of International Day for Biological Diversity

ISTANBUL, TURKIYE - MAY 16: A crab hides beneath Eunicella cavolini corals, before being cleaned from mucilage near Sivriada, Istanbul, Turkiye on May 16, 2025. The species, which relies on opening its polyps to feed on zooplankton carried by the current, faces a deadly threat when mucilage blocks its polyps, preventing it from feeding. Underwater cinematographer and documentary producer Tahsin Ceylan, alongside the Coast Guard Command Istanbul's diving teams, took action to clean the corals covered in mucilage. Using spare air tanks and low-pressure air guns, they carefully removed the mucilage. (Photo by Tahsin Ceylan/Anadolu via Getty Images)