manatee

n. plant eating aquatic mammal (found on the Atlantic shores of the tropics)

Manatees (family Trichechidae, genus Trichechus) are large, fully-aquatic marine mammals sometimes known as sea cows. The name comes from the Spanish manatí, which itself comes from a Carib word meaning "breast." They comprise three of the four living species in the order Sirenia, the other being the dugong, which is native to the Eastern Hemisphere. The Sirenia is thought to have evolved from four legged land mammals over 60 million years ago, with the closest living relatives being the Proboscidea (elephants) and Hyracoidea (hyraxes).
See more at Wikipedia.org...

Noun
1. sirenian mammal of tropical coastal waters of America; the flat tail is rounded
(synonym) Trichechus manatus
(hypernym) sea cow, sirenian mammal, sirenian
(member-holonym) Trichechus, genus Trichecus

(n.)
Any species of Trichechus, a genus of sirenians; -- called alsosea cow.
  

     emanate