Bryan McAllister’s personal reference notebook
September 11, 2026Short & citedBlog
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Field Notes • Marine Mammal

Manatee

Manatees are large, slow-moving aquatic mammals in the genus Trichechus, sometimes called sea cows.

Updated September 11, 20261 min readCited sources

Manatees are large, slow-moving aquatic mammals in the genus Trichechus, sometimes called sea cows. They are herbivores that live in warm shallow waters, rivers, and estuaries.

What it is

Manatees belong to the family Trichechidae and the order Sirenia. There are three living species: the Amazonian manatee, West Indian manatee, and West African manatee. These gentle giants have flippers, a flat paddle-shaped tail, and spend much of their day grazing on aquatic plants.

Where they live and what they eat

Manatees inhabit shallow rivers, estuaries, bays, canals, and coastal waters in tropical and subtropical parts of the Americas and West Africa. They are primarily herbivorous, feeding on seagrasses and other aquatic vegetation. They can consume large quantities of plants each day.

Why it matters

All three manatee species are considered at risk of extinction, with conservation statuses varying from vulnerable to higher threat levels. Major threats include habitat loss, boat strikes, hunting in some regions, and environmental changes. Protecting their warm-water habitats is critical for their survival.

In short

  • Manatees are large aquatic mammals known as sea cows.
  • Three living species: Amazonian, West Indian, and West African.
  • Herbivores that graze on aquatic plants in warm waters.
  • All species are considered at risk of extinction.
Canadian angle

Manatees are not native to Canada, but Canadian readers may encounter them in aquariums, zoos, conservation education, and travel to warm coastal regions where they live.

Quick questions

What is a manatee?
A manatee is a large aquatic mammal in the genus Trichechus, commonly known as a sea cow.
How many species of manatee are there?
There are three living species: the Amazonian manatee, West Indian manatee, and West African manatee.
Are manatees endangered?
Conservation status varies by species, but major sources describe them as at risk, with all three living species listed as vulnerable or under elevated threat.

Sources

  1. Encyclopaedia Britannicahttps://www.britannica.com/animal/manatee
    Supports: Manatee taxonomy, genus Trichechus, and general description.
  2. PBS Naturehttps://www.pbs.org/wnet/nature/blog/manatee-fact-sheet/
    Supports: Family Trichechidae and the three accepted living species.
  3. National Geographichttps://www.nationalgeographic.com/animals/mammals/facts/manatees
    Supports: General size, diet, lifespan, and habitat overview.
  4. Smithsonian Magazinehttps://www.smithsonianmag.com/science-nature/14-fun-facts-about-manatees-180950308/
    Supports: Conservation status context for manatees and related dugongs.
  5. Save the Manatee Clubhttps://savethemanatee.org/manatees/manatee-facts/
    Supports: Habitat, feeding, physical characteristics, and range details.
  6. Natural History Museumhttps://www.nhm.ac.uk/discover/what-is-a-sea-cow.html
    Supports: Species list, diet, lifespan, and conservation notes.