GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY
Moorish idols (Zanclus cornutus) on a coral reef. This fish inhabits around coral reefs in the tropical Indo-Pacific region. It feeds mainly on sponges and algae. It can reach a length of 20 centimetres. Photographed in the Andaman Sea, Thailand.
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