ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY
Starfish (Astropecten aurantiacus) on the seabed. This is the largest starfish in the Mediterranean Sea, growing to a diameter of 60 centimetres. It moves using the hundreds of tube feet which line the undersides of its five arms. Its mouth lies underneath 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 them apart. Photographed off Levant Island, France, in the north-western Mediterranean Sea.
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