MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY
Pygmy seahorse (Hippocampus denisii) camouflaged in coral (lower right). A seahorse is a fish that has a prehensile tail, which it uses to hold onto coral and plants. It feeds on plankton that it sucks in through its snout. This seahorse is a newly discovered species (in 2003) and is only 1.5 centimetres long. Photographed in Kimbe Bay, Papua New Guinea.
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