cetacea defined in 1951 yearcetacea - cetacea;
cetacea - Whales, porpoises, dolphins. An order of placental Mammals. They are completely aquatic, and have many special features connected with this mode of life, such as layer of fat (blubber) in the skin; no hind limbs and only traces of pelvic girdle; fore-limbs paddle-like; tail-fin transverse (unlike fishes); often a dorsal fin.
near cetacea in Knolik
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