Quick answer
Manatees (Trichechus manatus) typically live around 40+ years in the wild. Wild averages fall when predation, disease, or habitat loss rise; managed populations can live longer with stable food and veterinary care.
Key takeaway
Manatees (Trichechus manatus) typically live around 40+ years in the wild. Wild averages fall when predation, disease, or habitat loss rise; managed populations can live longer with stable food and veterinary care.
Manatee lifespan in the wild
Field and museum records place most manatees near 40+ years in the wild. That figure blends ages at death across regions, so treat it as a planning range. Body size (200–600 kg (440–1,300 lb)) and risk lifestyle both shape the average.
What shortens manatee lives
Predation, infectious disease, injury, food shortages, and habitat fragmentation cut survival. Roadkill and human conflict matter wherever manatees share landscapes with people.
What helps manatees live longer
Connected habitat, low chronic stress, and reliable food support longevity. For captive or domestic relatives, species-correct diet and veterinary screening matter more than generic “pet” advice.
Manatee life stages
Juveniles usually face higher mortality than prime adults. Older animals may move less, show dental wear, or lose body condition — useful signs when ageing manatees in the field.
Surprisingly close to elephants
Manatees are not related to whales or seals. Their closest living relatives are elephants, with which they share traits such as continually replaced molar teeth and thick, sparse body hair. The group that includes manatees and the dugong is called the Sirenia, the likely origin of old sailors' mermaid legends.
Habitat and range
The West Indian manatee lives along the Atlantic coast from the southeastern United States through the Caribbean to northern Brazil. It moves freely between salt, brackish, and fresh water, following warm temperatures and the seagrass beds it depends on for food.
Sources
Manatee FAQs
How long do manatees live?
Manatees (Trichechus manatus) typically live around 40+ years in the wild. Wild averages fall when predation, disease, or habitat loss rise; managed populations can live longer with stable food and veterinary care.
What is the scientific name of the manatee?
Trichechus manatus — used in research and conservation listings for manatees.
What do manatees eat?
Manatees eat seagrass and water plants, with seasonal and regional variation in Warm rivers, estuaries, and shallow coasts.
Where do manatees live?
They are associated with Warm rivers, estuaries, and shallow coasts. Local presence depends on food, cover, and human land use.
What is the conservation status of manatees?
Listed in our guides as Vulnerable. Check the IUCN Red List and national assessments for the latest formal category.