Sea cow. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/sea-cow
Any of several large herbivorous marine mammals of the order Sirenia, having a paddlelike tail, forelimbs shaped like flippers, and no hind limbs, and including the manatee, the dugong, and Steller's sea cow (Hydrodamalis stelleri) of the northern Pacific, which became extinct in the late 1700s. Also called sirenian .
The northern sea-cow (Rhytina), now extinct, appears to have been toothless throughout life.
The dugong (Halicore) is distributed in different colonies, at present isolated, throughout the Indian Ocean from Arabia to North Australia; while the Rhytina or northern sea-cow was, for some time before its extinction, limited to a single island in the extreme north of the Pacific Ocean.
Perhaps the most interesting mammal of Brazil is the manati, or sea-cow (Manatus americanus), which inhabits the lower Amazon and sometimes reaches a length of 15 to 20 ft.