CHRISTOPHER SWANN / SCIENCE PHOTO LIBRARY CHRISTOPHER SWANN / SCIENCE PHOTO LIBRARY
Mobula rays (Mobula japonica). Rays, a type of fish, can travel in schools of over a hundred below the water's surface. As well as spending most of their time underwater, they can also leap into the air in a behaviour known as breaching. The reasons for this behaviour include escaping predators and shaking off parasites. This ray can reach lengths of 5 metres across. Photographed in the Gulf of California, a body of water between the Mexican mainland and Baja California.
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