Exploring the World of Whales by Tracy C. Read [Hardback, 24 pages]
With sturdy, streamlined bodies, outfitted with insulating blubber, flippers, tail flukes and fins, whales -- all known as cetaceans -- are built for life in the water. These marine mammals range in size from the 108-foot-long (33 m) blue whale to the barely 9-foot-long (2.7 m) dwarf sperm whale while boasting a range of distinctive physical traits, including the sperm whale's gigantic head, the humpback's barnacle-covered body and outsized flippers, and the narwhal's eight-foot-long tusk.
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