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external links credits the suborder mysticeti contains four families and fourteen or fifteen species . the scientific name derives from the greek word mystax, which means "mustache." overview whales are members of the order cetacea , which also includes dolphins and porpoises . whales are the largest mammals
, the largest vertebrates , and the largest known animals in the world. like all mammals , whales breathe air into lungs , are warm-blooded , breast-feed their young, and have hair (although very little). unlike fish , which breathe air using gills, whales breathe air through blowholes that lead into...
https://www.newworldencyclopedia.org/entry/Baleen_whale