#sea_cow__seacow__sirenian_mammal__sirenian  any of two families of large herbivorous aquatic mammals with paddle-shaped tails and flipper-like forelimbs and no hind limbs
  supertype:  aquatic_mammal__aquaticmammal  whales and dolphins; manatees and dugongs; walruses; seals
  member of:  order_Sirenia
  subtype:  manatee__trichechusmanatu  sirenian mammal of tropical coastal waters of America; the flat tail is rounded
  subtype:  dugong__Dugong_dugon  sirenian tusked mammal found from eastern Africa to Australia; the flat tail is bilobate
  subtype:  Steller's_sea_cow__Hydrodamalis_gigas  extinct large sirenian mammal formerly found near Asiatic coast of the Bering Sea

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