ANDREW J. MARTINEZ / SCIENCE PHOTO LIBRARY ANDREW J. MARTINEZ / SCIENCE PHOTO LIBRARY
Bridled burr fish. Inflated bridled burr fish (Chilomycterus antennatus), a type of puffer fish. It has inflated itself to deter predators. The spines lie flat against its back when not inflated. It inflates by gulping water into a body cavity. This fish eats crustaceans and molluscs, which it crushes with its powerful jaws. It may reach 30 centimetres in length. Photographed off Bonaire Island in the Netherlands Antilles.
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