Manatees and dugongs are members of the order Sirenia. Sirenia includes 4 living species: the West Indian manatee, the West African manatee, the Amazonian manatee, and the dugong. The West Indian manatee has two subspecies, the Florida and Antillean manatees. They are all listed as vulnerable to extinction on the IUCN's (International Union for Conservation of Nature and Natural Resources) red list. The order once included a fifth modern species, the Steller’s sea cow.
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