Prolonged exposure to water temperatures below 68 °F (20 °C) can bring about "cold stress syndrome" and death.

The Amazon manatee is found only in freshwater river systems.

Manatee - Ecology - Range and Habitat - West Indian.

They have large, strong tails that power their swimming. Manatees range in size from 8 to 13 feet (2.4 to 4 meters) and can weigh 440 to 1,300 lbs. Manatees can be found in shallow, slow-moving rivers, estuaries, saltwater bays, canals, and coastal areas — particularly where seagrass beds or freshwater vegetation flourish. From above the water's surface, the animal's nose and nostrils are often the only thing visible.

Manatees are usually seen alone, in pairs, or in small groups of a half dozen or fewer animals. The Science Issue and Relevance: Florida manatees range along the Gulf of Mexico coast from Florida to Texas, although little is known about manatee use areas and habits west of the Suwannee River. Florida manatees generally grow to around 3 metres (10 feet) but range in length from about 2.5 to 3.9 metres (8 to 13 feet) and weigh up to 1,655 kg (3,650 pounds). Their front flippers help them steer, or sometimes crawl, through shallow water.

Habitat and Range. Manatees are sensitive to cold. Manatees are herbivores; however, they also eat clams, mollusks, and fish found in nets. They also have powerful, flat tails that help propel them through the water.

Most of their time is spent eating, resting, and traveling. Geographic Range. Amazonian Manatee Range. The West Indian manatee or sea cow (Trichechus manatus) is commonly found in shallow coastal areas, but can also be found in shallow rivers, estuaries, and canals.In the United States this species is concentrated around Florida in the winter months and migrates as far north as Virginia and as far west as Louisiana in summer months. The Amazonian manatee ranges throughout the Amazon River Basin of northern South America. The Florida manatee, Florida’s state marine mammal, is a large aquatic relative of the elephant. Along with a documented increase in the Crystal River subpopulation, winter use at alternate natural springs in northwestern Florida is increasing. The percentage of the diet that is composed of non-plant material varies based on location, with manatees living off the coast having a lifetime average of 50% non-plant material. Manatees are grayish brown in color and have thick, wrinkled skin on which there is often a growth of algae. Enhance protection and restoration of seagrasses and freshwater vegetation in proximity to warm water habitats. The West African manatee is the only sirenian that seems to intentionally consume non-plant material.

The Amazon manatee or South American manatee is an aquatic mammal that can be found in the rivers, swamps and wetlands of the Amazon River basin.

Manatee Habitat. West Indian. The murky waters often make it hard to see the manatee and therefore accurate population numbers are unknown; however, they are believed to be in decline due to hunting and habitat loss.

West Indian and West African manatees are able to live in both sea water and fresh water. The Antillean subspecies is very similar but is distinguishable from the Florida manatee by measurement differences of cranial characters between the species.

Establish minimum flows at Florida springs that protect the warm-water habitat requirements of manatees. Diet. They are found in a range of coastal and estuarine habitats as well as in rivers and canals. The coast of Georgia is usually the northernmost range of the West Indian manatees because their low metabolic rate does not protect them in cold water.