DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Brittle star (Amphipholis squamata) in a rock pool. Brittle stars are marine echinoderms, closely related to starfish. They have five arms radiating from a central disc-shaped body. Their thousands of eggs are on the underside of the arms and disk. Here the central disk is 4 millimetres in diameter.
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