PETER SCOONES / SCIENCE PHOTO LIBRARY PETER SCOONES / SCIENCE PHOTO LIBRARY
Wrasse (Thalassoma sp.) on a coral reef. Wrasse vary greatly in size, shape and colour. Most species are sand burrowers, feeding on invertebrates and plankton. Members of most species are also capable of changing their sex as they grow; female wrasse often become brilliantly- coloured males when mature. Photographed in the Red Sea.
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