GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY
Californian sea lions (Zalophus californianus) swimming underwater. This sea lion inhabits coastal regions of the eastern Pacific Ocean. It feeds mainly on fish and cephalopods (squid and octopus). Males are far larger than females, reaching 2.5 metres in length and up to 340 kilograms in weight. Females rarely achieve 100 kilograms in weight and reach a maximum length of around 1.8 metres. It is a social animal, and comes ashore in great numbers. It seems to prefer man-made structures, and this has caused problems in recent years as huge numbers crowd onto jetties, piers and pontoons. Photographed in the Galapagos. The Galapagos population has no contact with the population in North America.
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