Humpback whales are one of the largest living creatures. They are named after an obvious hump in front of their small dorsal fin. This hump is emphasised when they raise and bend their backs in preparation for a dive. Humpback whales grow to between 15 and 19 metres in length (about the size of a bus) and weigh approximately 40 tons. One of their most noticeable and distinctive features are their long and ungainly-looking pectoral fins (flippers). These can grow to nearly 5 metres long, making them relatively the longest flippers of any baleen whale. This gives them their Latin name, Megaptera novaeangliae, which means "big wing of New England." Humpback whales can be found in every ocean in the world, but intensive hunting over centuries by the whaling industry severely reduced humpback whale populations, until a whaling ban was put in place as recently as the 1980s. They feed by filtering their food through baleen plates, which are made up of fringed brushes which grow in rows from the upper jaw. They take huge gulps of water into their mouths, then push the water out through the plates, trapping their prey inside. This prey is mainly made up of krill - small crustaceans, as well as other small invertebrates, but may also include small schooling fishes such as anchovies, sardines, and mackerel. Humpback whales are well known for their haunting, evocative calls or 'songs'. These complex sequences of moans, howls, and cries can last for hours and travel vast distances through the ocean. (information from discoverwildlife.com)
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