MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY
Thorny seahorse. Close-up of a thorny seahorse (Hippocampus histrix). This seahorse inhabits seagrass beds and coral reefs throughout the tropical Indo-Pacific region, from east Africa to Hawaii. It can reach a length of around 17 centimetres. Photographed in Seraya, Bali, Indonesia.
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