ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY
Twoband anemonefish (Amphiprion bicinctus) with magnificent sea anemones (Heteractis magnifica) on a coral reef. Anemonefish, also called clownfish, live in association with anemones. Both partners benefit in a mutualistic association. Slime on the fishes' skin prevents the anemones' stinging cells from damaging them. The fish sleep, evade danger, eat, and lay their eggs between the poisonous tentacles. The anemonefish clean the anemones and also ensure a supply of food detritus for the anemones to feed on. These fish can reach a length of 14 centimetres. They are found in the western Indian Ocean and the Red Sea. Photographed in the Red Sea, at St John's Reef, southern Egypt.
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