MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY
Damselfish (Pomacentrus sp.) sheltering within a sea fan (Melithaea sp.). The average size of a damselfish is around 8 centimetres in length and it feeds on small crustaceans, plankton, and algae. Photographed off Sangalaki Island, in the Sulawesi Sea, Indonesia.
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