ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY
Starfish (Echinaster sepositus) on the sea floor. It has lost one of its five arms, and the new arm is seen regrowing at centre. This starfish lives in coastal waters in the Mediterranean Sea and Atlantic Ocean, preferring rocky areas. It moves on the hundreds of tube feet on the undersides of its five arms. Its mouth is under the centre of its body. Starfish mainly eat bivalve molluscs, whose shells they open by attaching one of their legs to each of the molluscs' two shells and pulling. Photographed off Levant Island, France, in the north-western Mediterranean Sea.
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