CHRISTOPHER SWANN / SCIENCE PHOTO LIBRARY CHRISTOPHER SWANN / SCIENCE PHOTO LIBRARY
Grey whale (Eschrichtius robustus) fluking (lifting its tail) as it dives. Whales dive to feed, coming to the surface for air. This whale is found in coastal waters, migrating with the seasons from Arctic waters to tropical equatorial waters. It can grow up to 15 metres in length and weigh 16 tonnes. Photographed in the Gulf of California, a body of water between the Mexican mainland and Baja California.
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