Manatees are large, fully aquatic marine mammals sometimes known as sea cows.Manatees are mainly herbivores, spending most of their time grazing in shallow waters and at depths of 1-2 meters (3-7 ft).Gentle and generally slow-moving. Most of the time is spent eating vegetation (100-150 lbs. per day), resting and traveling. On average manatees can travel about 40 to 50 miles a day, sometimes farther. Chessie, the famed manatee rescued from the cold waters of the Chesapeake Bay and returnedto Florida, was tagged with a locating device which showed he traveled as far as Rhode Island during hot summer months.Some people believe Manatees are near sighted, or may have limited depth perception. It is believed that they can differentiate between colors. It is unclear how manatees navigate in pitch black or murky waters – when their eyesight would be of no use. They do have sparse bodyhair over their bodies, and thick whiskers on their faces. It is not clear if this aids in navigation. Manatees can hear very well despite the absence of external ear lobes. They are not believed to have the capabilities of echolocation.They make sounds such as squeaks and squeals when frightened, playing, or communicating; particularly between cow and calf. No air is released from the manatee when these sounds are made.These “sea cows” are really beefy, but really cute. So cute you want to hug it. Not surprisingly, they are related to elephants. They are endangered, partly due to a vicious, unnatural predator: the boat propeller.