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Word Count: 1,116
Whales dolphins and porpoises make up the classification order Cetacea which contains two suborders Mysticeti and Odontoceti The baleen whales are members of the Mysticeti suborder while the toothed whales dolphins and porpoises make up the suborder Odontoceti Altogether the two suborders contain eighty-one known species separated into thirteen different families In each family are a number of species each classified further into sub-families or genera of which there are 40 What Are Cetaceans There are many misconceptions about cetaceans whales dolphins and porpoises the most common of which is the idea that cetaceans are fish Theyre not - they are mammals like you and me Millions of years ago they lived on land their bodies were covered in hair they had external ears they walked on four legs they beared live young As mammals cetaceans have these characteristics that are common to all mammals They are warm-blooded animals
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