West Indian Manatee

Overview

The West Indian manatee is a large, fully aquatic marine mammal recognized as the largest living member of the order Sirenia. Often referred to as a sea cow, this species is divided into two primary subspecies: the Florida manatee and the Antillean manatee. These animals are well adapted to a life of slow movement in coastal environments.

Distribution & habitat

This species inhabits warm coastal regions, shallow brackish bays, sluggish rivers, and estuaries across the tropical and subtropical New World. Their range extends from the southeastern United States and the Gulf of Mexico through the Caribbean and Central America down to the northern coast of South America. Because they possess a low metabolic rate and lack thick layers of insulating blubber, they are highly sensitive to cold water temperatures and must seek warmer thermal refuges during cooler months.

Appearance

These mammals possess a robust, streamlined, and nearly hairless body with gray or brown skin that frequently bears algae growth or scars from boat propellers. They lack hind limbs entirely, featuring instead a broad, paddle-shaped horizontal tail fin used for propulsion. Their front limbs are modified into flexible flippers that help them steer, dig for vegetation, and interact with conspecifics.

Biology & behavior

Manatees spend much of their time grazing, resting, or traveling slowly through shallow waters. While they are fully aquatic, they are mammalian and must surface regularly to breathe air, though they can remain submerged for extended periods while resting. They generally lead solitary lives or gather in loose, non-permanent aggregations, except for mothers and dependent calves or groups formed during the breeding season.

Feeding

As strict herbivores, these animals feed on a wide variety of freshwater and marine plants, including seagrasses, freshwater vegetation, and floating algae. They use specialized, highly mobile upper lips covered in stiff bristles to grasp and pull vegetation into their mouths, relying on continuously replaced molar teeth to grind down tough plant material.