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{{Taxobox
| color = pink
| name = Manatee
| status = vu
| image = Manatee_with_calf.PD.jpg
| image_width = 250px
| image_caption = Manatee with calf.
| regnum = ]ia
| phylum = ]
| classis = ]ia
| ordo = ]
| familia = '''Trichechidae'''
| familia_authority = ], ]
| genus = '''''Trichechus'''''
| genus_authority = ], ]
| subdivision_ranks = ]
| subdivision =
'']''<br />
'']''<br />
'']''
}}
'''Manatees''' (] '''Trichechidae''', ] '''''Trichechus''''') are large aquatic ]s sometimes known as '''sea cows'''. The Trichechidae differ from the ] in the shape of the skull and the shape of the tail. Manatees' tails are paddle-shaped, while the Dugong's are forked. They are ]s, spending most of their time grazing in shallow waters, and can weigh anywhere from 1,000 to 2,000 pounds.

Manatees inhabit the shallow, ]y coastal areas of ], ], and ], and the ].

== Vulnerable ==

All three species of manatee are listed by the ] as Vulnerable to extinction. Although it does not have any natural predators, human expansion has reduced its natural habitat in the coastal marsh areas and many manatees are injured by the propellers of outboard motor boats. Manatees will often ingest fishing gear (hooks, metal weights, etc.) during feeding. These foreign materials do not seem to harm manatees, except for ] or string. This can get clogged in the animal's digestive system and slowly kill the animal.

Manatees are killed and injured by propellers and by impacts from boat hulls. They can also be crushed in water control structures (navigation locks, flood gates, etc.), drown in pipes and culverts, and are occasionally killed due to ingestion of fishing tackle (hooks have been known to perforate the ]) and entanglement in fishing gear (crab pot float lines, shrimp trawls, cast nets, etc.)

== Genetics ==

One of the closest surviving relatives of the manatee is the ]. Manatees have many anatomical parallels with elephants, including a long, flexible nose or trunk, whiskers, and toenails.

== Habitat ==

Manatees often congregate near power plants, which warm the waters. Some have become reliant on this source of unnatural heat and have ceased migrating to warmer waters. Some power plants have recently been closing and the U.S. Fish and Wildlife Service is trying to find a new way to heat the water for these manatees.

The main water treatment plant in ] has three manatees that keep storage canals clear of weeds.

==References==
*{{MSW3 Shoshani|pages=93}}

==External links==
{{commons|Manatee}}
* An educational website of Earth's Endangered Animals.

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{{Link FA|pt}}

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Revision as of 08:17, 24 May 2006

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