GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY
Thorny seahorse (Hippocampus histrix) against algae. This fish inhabits coral reefs in the Indo- Pacific region. It feeds on tiny crustaceans, which it sucks in through its tubular mouth. It can reach a length of 12 centimetres. Photographed off Malaysia.
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