90 Fun Facts About Manatees

What is the primary diet of manatees?

Manatees are primarily herbivores, consuming a wide variety of aquatic vegetation such as seagrasses, water hyacinths, and other submerged and emergent plants.

Manatees belong to which scientific order?

Sirenians are the only fully aquatic mammals that live on plants, and they are thought to have evolved from four-legged land mammals more than 60 million years ago.

As of 2025, how many living species of manatee were recognized?

Amazonian, West Indian and West African manatees make up three of the four living species in the order Sirenia.

What is the leading human-related cause of manatee deaths in Florida?

Collisions with boats and other watercraft are a leading cause of injury and mortality for manatees, particularly in areas with heavy human activity.

Manatees are often affectionately referred to by what common nickname?

Due to their large size, slow movements, and herbivorous grazing habits, manatees are commonly known as 'sea cows'.

Which manatee species is found exclusively in freshwater environments?

The Amazonian manatee is the only species of manatee that lives exclusively in freshwater, inhabiting the Amazon River basin.

Roughly how long can a manatee live in the wild?

Wild manatees are thought to live 50-60 years; the Florida subspecies has been documented reaching 60, and captive animals have lived well beyond that.

How does a manatee cope with a lifetime of chewing gritty plants that grind its cheek teeth down?

The molars work like a conveyor belt, moving forward roughly a millimetre or two a month, so a manatee never runs out even though its enamel is weak.

Manatees are distantly related to which land animal?

Manatees and elephants share the ancient lineage Tethytheria, which split from other land mammals more than 60 million years ago.

How long is a manatee pregnant?

After 12 to 14 months a single calf is born; twins are rare.

What does a manatee sound like?

Manatees squeak and screech to keep in contact, most of all between mothers and calves, and in noisy water they involuntarily raise their voices just as humans do.

Why do manatees seek out warm water refuges during colder months?

With almost no blubber and a very slow metabolism, a manatee in prolonged cold develops 'cold stress syndrome': frostbite-like skin lesions, loss of appetite and secondary infections.

How do manatees typically propel themselves through the water?

Manatees use their powerful, paddle-shaped tail (fluke) to propel themselves through the water with an up-and-down motion, similar to whales and dolphins.

A manatee's tail is paddle-shaped. What shape is a dugong's?

The tail is the clearest visible way to tell the two apart; dugongs also lack the nails manatees carry on their flippers.

What is unusual about the positioning of a manatee's lungs?

The lungs run the full length of the spine, and the diaphragm is split into two halves that can contract independently, letting a manatee trim its position in the water without moving a flipper.

What kind of skin do manatees have?

Manatees have thick, tough, and wrinkled gray skin that is sparsely covered with fine hairs (vibrissae), which provide a sense of touch.

How long can a manatee typically hold its breath when resting?

A resting manatee can go close to 20 minutes between breaths, but active dives are usually only two or three minutes long.

What is the purpose of the stiff whiskers (vibrissae) on a manatee's snout?

The stiff whiskers on a manatee's snout are highly sensitive vibrissae that help them detect and manipulate aquatic plants for feeding, as well as sense changes in water currents.

What kind of social structure do manatees generally exhibit?

Manatees are generally considered solitary animals, though mothers stay with their calves for an extended period, and several males may gather around a female during breeding season, forming a 'mating herd'.

What is the typical swimming speed of a manatee?

Manatees are generally slow swimmers, moving at about 3 to 5 miles per hour (5 to 8 km/h), though they can achieve speeds of up to 20 mph (30 km/h) in short bursts.

As of 2025, what was the IUCN Red List status of all three manatee species?

All three species (West Indian, Amazonian and West African) were listed as Vulnerable by the International Union for Conservation of Nature (IUCN) as of 2025.

Which body part does a manatee use to grab a mouthful of seagrass?

The big, flexible lip is also used for social contact and communication, not just for pulling plants into the mouth.

What is the scientific name for the West Indian manatee?

The West Indian manatee's scientific name is Trichechus manatus, which includes the Florida manatee and Antillean manatee subspecies.

Unlike almost every other mammal, how many neck vertebrae does a manatee have?

Manatees and sloths are the only mammals that break the seven-vertebrae rule; the manatee's six may come from mutations in the genes that lay out the body plan.

Approximately how much of their body weight can an adult manatee consume in aquatic vegetation daily?

Aquatic plants are so low in nutrition that a manatee grazes five hours or more a day to get through 4-10% of its body weight in wet vegetation.

How often does a female manatee give birth?

A female calves about once every two to three years, and wild females have been recorded giving birth into their late 30s.

Which manatee species often has a white or pinkish patch on its chest and lacks nails on its flippers?

The Amazonian manatee, the smallest manatee species, is characterized by its smooth skin, lack of nails on its flippers, and often a distinctive white or pinkish patch on its chest.

Florida designated the manatee its official state marine mammal in which year?

Florida's legislature designated the manatee the official state marine mammal in 1975; the dolphin became the state saltwater mammal under the same statute.

What is the average adult length of a manatee?

Adult manatees typically average 9 to 10 feet (2.8 to 3 meters) in length, though some can grow larger.

What term describes manatees' tolerance of both fresh and salt water?

Manatees are euryhaline, meaning they can tolerate a wide range of salinities and move freely between freshwater, brackish, and saltwater habitats.

At roughly what age do female manatees reach sexual maturity?

Female manatees reach sexual maturity at about 5 years of age, while males take closer to 9 years, one reason the species recovers slowly from losses.

Manatees are the only known animals whose eyes have which feature?

Every other animal's cornea is clear and bloodless; the manatee's is uniformly vascularized, possibly as protection against the fresh water it spends so much time in.

What is the maximum observed weight of a manatee?

While average adult manatees weigh between 800-1,200 pounds (360-540 kg), they can grow to be much larger, with some individuals reaching up to 15 feet (4.6 meters) long and weighing as much as 3,900 pounds (1,775 kg).

What is unusual about the way a manatee shuts its eyes?

The small, widely spaced eyes close with a circular sphincter-like motion, and manatees are the only known animals whose corneas carry blood vessels.

After a 2021 seagrass die-off left Florida manatees starving, wildlife officials fed them 3,000 pounds a day of what?

Manatee deaths in Florida nearly doubled to 1,100 in 2021, prompting an emergency feeding station that handed out over a tonne of lettuce every day.

Trichechus manatus latirostris is better known as what?

Trichechus manatus latirostris is the Florida manatee, the subspecies living at the northern limit of sirenian range, distinguished from the Antillean manatee (T. m. manatus) partly by its broader skull.

What is the main reason manatees have a slow reproductive rate?

A calf nurses and travels with its mother for up to two years, learning the migration routes and warm-water refuges it will need for the rest of its life.

What role do manatees play in their underwater ecosystems?

They eat over 60 species of aquatic plants, with seagrass the staple, which keeps the beds cropped and healthy.

Despite a small brain for their body size, what has research shown about manatee cognition?

In acoustic and visual tests manatees learn discrimination tasks about as well as dolphins and seals, and their social interactions are more intricate than their reputation suggests.

What is a group of manatees sometimes called?

While generally solitary, when manatees gather, often for warmth or abundant food, the group is referred to as an aggregation.

What sort of water do manatees live in?

Manatees prefer shallow, slow-moving waters of rivers, estuaries, saltwater bays, canals, and coastal areas, typically in depths of 3 to 7 feet (1 to 2 meters).

What is the average weight of a newborn manatee calf?

A newborn calf already weighs about 30 kg (65 lb) and measures over a metre long, and it will nurse from its mother for up to two years.

What feature helps manatees process their high-fiber, plant-based diet?

Manatees are hindgut digesters, meaning that the majority of their digestive processes, including the fermentation of cellulose from plants, occur in their large intestine and cecum, similar to horses.

Manatee Springs State Park, a winter refuge near Chiefland, feeds which Florida river?

Manatee Springs State Park near Chiefland pours roughly 100 million gallons a day into the Suwannee River, and manatees shelter in its 72°F spring run each winter.

Below roughly what water temperature do manatees become vulnerable to cold stress?

Below that, the risk of cold-induced stress or death climbs, so they head for warmer water when the temperature drops toward 68°F (20°C).

Which U.S. territory has a resident population of Antillean manatees?

Puerto Rico holds the United States' only resident population of Antillean manatees, a few hundred animals, while the Florida subspecies occupies the mainland.

Roughly what share of each day does a manatee spend asleep underwater?

About half of a manatee's day is spent sleeping submerged, surfacing periodically to breathe; most of the rest goes on grazing in water only one to two metres deep.

Snooty, among the first manatees born in captivity, died in 2017 as the oldest known manatee at what age?

Snooty was 69, born at the Miami Aquarium and Tackle Company in 1948 as one of the first recorded captive manatee births, and was never released.

Florida's Save the Manatee Club was co-founded in 1981 by Governor Bob Graham and which singer-songwriter?

Jimmy Buffett co-founded the club with Governor Bob Graham in 1981; its Adopt-A-Manatee program funds research, rescue and legal advocacy.

Which explorer logged three 'mermaids' off Hispaniola in 1493, now thought to be manatees?

Christopher Columbus complained the three 'mermaids' were not as beautiful as painted, having rather masculine faces, which fits a whiskered sea cow better than a siren.

In 1995, satellite-tagged manatee Chessie swam north from Maryland as far as which state?

In 1995 Chessie reached Point Judith, Rhode Island, the farthest north a manatee had then been tracked; biologists confirmed him again off Calvert County, Maryland, in July 2011.

In 2006 a manatee turned up in the Wolf River harbor of which Mississippi River city?

The manatee reached Memphis in October 2006 after travelling more than 700 river miles up the Mississippi from the Gulf of Mexico; it was found dead about 10 miles downriver that December.

The U.S. Marine Mammal Protection Act, which shields manatees, was passed in what year?

The Marine Mammal Protection Act became law in 1972, a year before the Endangered Species Act of 1973; Florida added its own Manatee Sanctuary Act in 1978.

In what year did the U.S. downlist the West Indian manatee to merely 'threatened'?

The U.S. Fish and Wildlife Service reclassified the West Indian manatee from endangered to threatened in March 2017; Save the Manatee Club objected, citing record boat-strike deaths from 2010 to 2016.

The word 'manatee' may come from the Carib word manaty, meaning what?

Manatí in the Carib and Taíno languages is usually glossed as 'breast', a nod to the female's two teats, which sit under the flippers where a calf nurses.

'Lamantin', an older alternative name for the manatee, comes from which language?

'Lamantin' is simply the French word for manatee, used by Buffon in his 18th-century Histoire Naturelle and borrowed unchanged by English writers.

The genus name Trichechus comes from a Greek root meaning what?

Trichechus comes from the Greek thrix, trichos, 'hair', a nod to the stiff whiskers around the mouth that manatees use to feel for food in murky water.

Stranded in deep lakes in the dry season, Amazonian manatees can fast for up to how long?

Large fat reserves and a metabolic rate only about 36% of a typical placental mammal's let Amazonian manatees survive up to seven months with little or no food as lakes shrink.

Which big cat is listed among the natural predators of the Amazonian manatee?

The jaguar is listed among the Amazonian manatee's natural predators, along with black caimans, though illegal hunting by people remains the biggest threat.

Mixira, sold illegally in Amazon markets, is manatee meat preserved in what?

Mixira is manatee meat fried and then sealed in its own fat, which preserves it without refrigeration; its high market price helps keep illegal hunting going.

African manatees live as far up the Niger River as Koulikoro, in which country?

That is some 2,000 km (1,200 mi) from the coast, an extraordinary inland reach for a marine mammal.

Which manatee is the only sirenian that seems to intentionally eat clams and fish?

The West African manatee is the only sirenian known to deliberately eat clams, molluscs and fish, especially along the coast, while estuary dwellers browse mainly mangroves.

Ghanaian scientists concluded the African manatee inspired which legendary water spirit?

A surfacing female can look like a woman-fish, according to CSIR researcher Mamaa Entsua-Mensah.

African manatees have been killed in the turbines of the Akosombo Dam, on which river?

The Akosombo Dam impounds the Volta River in Ghana as Lake Volta; dams such as Akosombo and Diama have also cut manatee populations off from the coast, genetically isolating them.

Red tides that poison manatees are blooms of which microscopic alga?

Karenia brevis, the Gulf of Mexico red-tide dinoflagellate, produces brevetoxins that attack the nervous system; manatees are poisoned both by inhaling them and by eating coated seagrass.

A 1996 red tide killed about how many Florida manatees in under two months?

The 1996 bloom killed 151 manatees in southwest Florida between March and April, roughly 15% of the known population on that coast at the time.

In which country did sugar estates use manatees to keep irrigation canals free of weeds?

Guyana's sugar estates put manatees to work grazing weeds out of irrigation canals, and Georgetown's water treatment plant did the same in its storage canals in the mid-20th century.

What is the name of the furniture-selling manatee in Animal Crossing: New Horizons?

Wardell, the manatee who runs the furniture shop on the Happy Home Paradise archipelago, arrived with that paid 2021 expansion rather than the base game.

Which novel's narrator expels 'Lamatins' and dugongs from his 'Kingdom of Cetology'?

In Moby-Dick's 'Cetology' chapter Ishmael dismisses lamatins and dugongs as noisy river-mouth lurkers that feed on 'wet hay' and, crucially, do not spout.

Kipling's 'The White Seal', whose hero follows a herd of Sea Cows, is in which collection?

'The White Seal' appeared in The Jungle Book (1894); its hero Kotick follows the slow, silent Sea Cows to a beach that men have never found.

Snooty's name is popularly believed to echo a radio show starring which comedian?

He was simply 'Baby' for his first year; 'Baby Snoots', a nod to Fanny Brice's radio character Baby Snooks, came in late 1949 and was shortened as he grew.

Manatee County, created in 1855, has which city as its seat of government?

Bradenton is the seat of Manatee County, which at its 1855 creation sprawled across land later split into Sarasota, DeSoto, Hardee and other counties.

The Crystal and Homosassa rivers, where about 600 manatees winter, are in which county?

Both rivers rise in Citrus County; their headsprings stay at 22 °C (72 °F) all year, which is why the Crystal River National Wildlife Refuge was created in 1983.

Blue Spring, a manatee refuge near Orange City, is the largest spring on which river?

Blue Spring is the largest spring on the St. Johns River, pouring out about 100 million US gallons a day at 73 °F; swimming and paddling stop during manatee season.

At Homosassa Springs Wildlife State Park, visitors watch manatees from what structure?

Visitors descend into the Fish Bowl, a floating observatory moored over the main spring, to watch manatees and fish through underwater windows.

Big Bend Power Station, whose warm-water outfall draws dozens of manatees each winter, sits on which Florida bay?

Tampa Bay's Big Bend plant, run by TECO, has had a public manatee viewing area since 1986 where dozens crowd its warm-water outfall each winter.

Steller's sea cow was hunted to extinction within how many years of its 1741 discovery?

Georg Wilhelm Steller described it while shipwrecked on Bering Island in 1741, and by 1768, just 27 years later, hunters prizing its meat, fat and hide had wiped it out.

Unlike seagrass-grazing manatees, the extinct Steller's sea cow fed mainly on what?

It fed on kelp: floating too buoyantly to dive, it cropped only the soft canopy, leaving tough stems to wash ashore in heaps.

Besides elephants, which small furry mammal is among the manatee's closest relatives?

Hyraxes, elephants and sirenians sit together in the clade Paenungulata; sirenians themselves evolved in the Eocene, about 50 million years ago.

Pezosiren, the first known sirenian, 50 million years old, had what that manatees lack?

Pezosiren still had four legs and could walk on land; fully aquatic sirenians with flippers and no hind limbs appeared later in the Eocene.

The bone-thickening that gives sirenian ribs their heavy, ballast-like density is called what?

Pachyostosis, the laying down of extra dense bone, turns the ribs into ballast that offsets the lift of the lungs so the animal can hang at the bottom to graze.

Male dugongs, unlike manatees, grow a pair of tusks from which teeth?

Dugong tusks are the upper incisors, which erupt through the gum in males at puberty; females' incisors keep growing hidden and sometimes erupt in old age.

The dugong, the manatees' only living sirenian cousin, has its largest population in which country?

Australia's dugong stronghold runs from Shark Bay to Moreton Bay, and the Great Barrier Reef alone hosts a stable population of about 10,000.

Food takes roughly how long to pass through a manatee's digestive tract?

Food takes about 7 days to pass through a manatee's gut; the slow passage boosts digestibility, and the constant fermentation may even generate warmth for an animal with a sluggish metabolism.

Manatees sometimes eat one another's feces, apparently to gather what?

Chemoreception matters a lot to them: the dung carries clues to reproductive status, and males appear able to sniff out estrous females, which is how mating herds form.

Manatees in noisy water raise their vocal effort, like humans, in what named effect?

This is the Lombard effect: manatees raise the loudness of their calls as background noise such as snapping shrimp rises, just as people talk louder at a party.

Manatees use body-wide vibrissae to sense water movement much like which fish organ?

The body hairs act like a fish's lateral line, registering tiny water movements; the denser facial vibrissae can even discriminate textures by touch.

The Florida manatee has been spotted as far north as Dennis, a town in which state?

Dennis is on Cape Cod, Massachusetts, where a young Florida manatee was rescued from cold water in October 2008; others have wandered west along the Gulf Coast to Texas.

About what share of adult Florida manatee carcasses bear scars from boat collisions?

A study of adult carcasses found 96% bore healed watercraft scars, some showing 10 or more separate strikes; over half of watercraft deaths come from hull impact rather than propellers.

River Safari, renamed River Wonders in 2021, keeps manatees in which Asian city-state?

In the United States, critical-care manatee hospitals are run at ZooTampa, Miami Seaquarium and SeaWorld Orlando.