MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY
Pygmy seahorse (Hippocampus bargibanti) camouflaged against sea fan coral. This seahorse is an unusual colour variation of the pygmy seahorse, which is usually pink. It is around three centimetres in length. Photographed off Maratua Island, in the Sulawesi Sea, Indonesia.
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