Steller's sea cow

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Noun1.Steller's sea cow - extinct large sirenian mammal formerly found near the Asiatic coast of the Bering Sea
sea cow, sirenian, sirenian mammal - any of two families of large herbivorous aquatic mammals with paddle-shaped tails and flipper-like forelimbs and no hind limbs
genus Hydrodamalis, Hydrodamalis - a genus of the family Dugongidae comprising only Steller's sea cow
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References in periodicals archive ?
Also in summer large numbers of northern fur seals (Callorhinus ursinus) were killed, along with a number of Steller's sea cows (Hydrodamalis giga) all of which helped to restore the health of many of the survivors.
On page 240, you'll read about "a small heard of caribou." A biologist states on page 155 that Steller's sea cow went extinct "at the turn of the century," but it actually had gone extinct by 1768.