ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY
Humpback whale. Tail of a humpback whale (Megaptera novaeangliae). Humpbacks often make leaps out of the water and beat the surface with their tails, possibly as a form of communication. The humpback whale has numerous baleen plates, formed from bristles, hanging down from its jaws. It feeds by swallowing sea water and then pressing its tongue against the bristles, pushing the water out and trapping krill and fish. Adult humpback whales weigh around 27 tonnes and can reach 15 metres in length. They are found in deep water near coasts in all of the world's oceans. Photographed in the Indian Ocean, off Madagascar.
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