Manatees - Facts, Information & Pictures (2024)

The manatee, belongs to the family Trichechidae and is a fully aquatic marine mammal. Sometimes known as sea cows, they make up three of four of the order of Sirenia. The Sirenia currently comprise two distinct families: Dugongidae (the dugong and the now extinct Steller’s sea cow) and Trichechidae.

Within the Trichechidae family, there is the Amazonian manatee (Trichechus inunguis), the West Indian manatee (Trichechus manatus), and the West African manatee (Trichechus senegalensis).

These wonderful animals are really interesting to look at, and even more interesting to learn about. Keep reading on to find out all you need to know about the manatee.

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Characteristics

Despite being nicknamed the sea cow, manatees actually more closely resemble an elephant. Large and gray, the average adult is about 10 feet long and weighs between 800 and 1,200 pounds. Females tend to be larger and heavier than males.

At birth, baby manatees weigh about 30 kg (66 lb) each.

Their bodies are round and taper to a flat, paddle-shaped tail, which differentiates them to the dugong, which has a fluked tail, similar to a whale. They have front flippers, each with three to four “fingernails”, except the Amazon manatee, which has no nails (its Latin species name “inunguis” means “without nails”). The bones in the flippers are similar to a human hand, with jointed finger bones.

Manatee skeletons are made of very dense bone, which gives the animal neutral buoyancy, meaning its physical body density is equal to the water in which it swims. They also only have six neck vertebrae, while most other mammals have seven. This means that they cannot turn their head and must turn their entire body to see what’s going on behind or to the side of them.

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The female also has two teats, one under each flipper, which is a characteristic that was used to make early links between the manatee and elephants.

A manatee’s eyes appear to be small, but their vision is actually very good. They are able to distinguish different sized objects, colors, and patterns. Their eye muscles close in a circular motion, like an aperture on a camera.

Their mouths contain no more than six teeth at one time, and their teeth are called “marching molars” because they are replaced throughout life as they wear down from the abrasive diet or fall out. They also have no incisor or canine teeth. Their upper lip is large and flexible and allows them to gather food.

While the sensory system of a manatee has not been well studied, it is thought they have excellent hearing. Despite not having outer ear structures, they have large inner ear bones and it is thought these help them to communicate with each other. Manatees emit chirps, whistles, and squeaks, all of which indicate how they are feeling to other manatees, even when the water is murky.

Manatees have a large cecum despite their simple stomach, and their intestines are about 45 meters long, which is unusually long for the manatee’s size. The large cecum allows them to digest tough plant matter.

Amazonian manatees are the smallest of the three species. These are shorter and more slender than the Indian variant. The longest recorded specimen measured 9.2 feet. (2.8 metres). One particularly large specimen weighed 480 kilograms (105 pounds).

Lifespan

Manatees have been known to live for up to 60 years.

Diet

Manatees are herbivores and eat over 60 different freshwater and saltwater plants. In fact, they eat between 100 to 150 pounds of underwater greens a day and, because they are large, they must feed for almost half of the day. This equates to them eating around 10 to 15 percent of their body weight every day. Manatees have been known to eat small numbers of fish from nets.

To gather food, they use their flippers to “walk” along the bottom whilst they dig for plants and roots. When they find a plant, they use their flippers to scrape the plant towards their mouth, and their lips, which the upper half of is split, use seven muscles to move.

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Behavior

Manatees are slow-moving animals and are very gentle. They are generally solitary animals and spend their days eating, resting, and traveling. Around 50% of their time is spent sleeping. It has been said that, if you spot a group of manatees, it is likely to be a mating hard because they usually swim alone or in pairs. When they are in pairs or groups, they sometimes use their flippers to touch and soothe each other.

Because they are mammals, they must surface every so often for air. This usually happens every three to five minutes, but if they are using a lot of energy, it could be as often as every thirty seconds. On the flip side, if a manatee is resting, they have been known to stay submerged for as long as twenty minutes! When they do take a breath, 90 percent of the air in their lungs is replaced! Humans only replace about 10 percent.

A manatee usually stays just below the surface of the water, at depths of around 1–2 m (3 ft 3 in–6 ft 7 in), which is often the reason they are hit by boats and have collisions with other vessels.

While these mammals are mostly slow-moving, they can be swift, too. They usually travel as a pace of about 5 miles per hour (8 kilometers per hour), but can go as fast as 15 miles per hour (24 kilometers per hour). They also have a very good long term memory.

Healthy manatees have no natural predators, although alligators, crocodiles and sharks may prey on young or weak manatees. They are also hunted for their meat in West Africa. When threatened, the manatee’s response is to dive as deeply as it can, which suggests that their biggest threat comes from boats and humans instead of other sea creatures.

Breeding

Manatees breed around once every two years and normally only one calf is born. Their gestation period is around 12 months and it takes around 12 to 18 months to wean a calf. Females may be courted by around 12 different males, and, once a male has mated, he has no part in raising the young.

Newborns can swim about an hour after they are born. They become mature at about five years old.

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Habitat

Manatees live in coastal waters, slow-moving rivers, estuaries, lagoons and saltwater bays, and will migrate to warm waters in the winter. African manatees live along rivers and coasts of western Africa, the Amazon manatee lives in the Amazon River’s drainage, from the headwaters in Colombia, Peru, and Ecuador to the mouth of the Amazon in Brazil, and the West Indian or American manatee lives in the southern and eastern US, often Florida.

Both West African and West Indian manatees need water that is at least 60 degrees Fahrenheit (15.6 degrees Celsius), which is down to the fact they have a low metabolic rate and minimal fat layer. These two species also have an internal regulation system that works with the kidneys to keep salt concentrations at manageable levels, which allows them to live in both salt water and fresh water. On the other hand, Amazon manatees are restricted to fresh water.

Conservation Status

Unfortunately, the International Union for Conservation of Nature (IUCN) Red List of Threatened Species lists all three species of manatee as vulnerable and decreasing in numbers.

Manatees were actually among the first creatures listed on the Endangered Species Preservation Act of 1966. Luckily, over the years, conservation efforts has decreased the manatee mortality rate and allowed them to be declared as “vulnerable”, which means they are still protected under the Endangered Species Act, but not considered “endangered”.

The population is affected by climate change, pollution, and human activities. They need clean oceans and areas of sea with boat speed zones to continue to help them thrive.

Manatee Fun Fact!

Because algae thrives in wet areas with lots of sunlight and manatees swim just below the surface of the water, the manatee’s back is an ideal breeding ground for algae! Fortunately, algae helps to block out harmful rays from the sun.

Summary Points:

  • They have a streamlined body – full around the middle and narrowing to a paddle-shaped tail.
  • Manatees are a greyish-brown color, however, Amazonian manatees usually have white or pink patches on the belly and chest. Organisms such as algae, which may grow on the skin of these slow-moving individuals, help determine their coloration.
  • They have two small pectoral flippers on their upper body which are used for steering. These flexible flippers may also be used for bringing food to the manatees mouth and for guiding movement along a waterways bottom.
  • Manatee flippers have five digits that are covered by a thick layer of skin. This bone structure is similar to that of toothed whales, seals, and sea lions. They have no externally visible neck.
  • They do not have external ear flaps and the opening to the ear canal is very small.
  • They have two nostrils that lie on top of the head at the end of the snout.
  • Manatees have a large flexible upper lip. Their lips help guide vegetation into their mouth. Vibrissae (whiskers) are found on the surface of this lip.
  • The only teeth are 24 to 32 molars located in the back of the mouth.
  • They swim by moving their large paddle like tail in an up-and-down motion.

More Fascinating Animals to Learn About

  • West Indian Manatee

  • West African Manatee

  • Amazonian Manatee

  • Galapagos Marine Iguana

  • Marine Angelfish

  • Teira Batfish (Platax teira)

Manatees - Facts, Information & Pictures (2024)

FAQs

Manatees - Facts, Information & Pictures? ›

Adult manatees are typically 9-10 feet long from snout to tail and weigh around 1,000 pounds; however, they may grow to over 13 feet long and weigh more than 3,500 pounds. Manatees have two fore limb flippers that they use for steering movements and to hold vegetation while eating.

How long do manatees live? ›

Lifespan: Manatees are thought to live 50 to 60 years in the wild. They may live over 65 years in captivity.

How many manatees are left? ›

How many manatees are left? Last fall, the manatee population in Florida was estimated at 8,350 to 11,730, based on an assessment from 2021 to 2022. The global population of manatees is estimated to be at a minimum of 13,000, according to the U.S. Fish and Wildlife Service.

What is a female manatee called? ›

A female manatee, called a cow, can give birth about once every 3 years.

Can a manatee live out of water? ›

Manatees never leave the water but, like all marine mammals, they must breathe air at the surface. A resting manatee can remain submerged for up to 15 minutes, but while swimming, it must surface every three or four minutes. This West Indian manatee was photographed at Dallas World Aquarium in Texas.

What does a manatee eat? ›

Manatees are aquatic herbivores (plant-eaters). Also known as "sea cows," these herbivores usually spend up to eight hours a day grazing on seagrasses and other aquatic plants. A manatee can consume from 4 to 9 percent of its body weight in aquatic vegetation daily.

Do manatees lay eggs? ›

Manatees are large aquatic mammals, which means they are warm blooded, breathe air, don't lay eggs, and nurse their young with milk.

How long is a manatee pregnant? ›

Once the female is pregnant, her gestation period, the period of time she carries the baby before giving birth, is about twelve to fourteen months. Manatees are mammals. This means they give birth to live young (as opposed to laying eggs), and they nurse their babies, which are called calves.

Do alligators eat manatees? ›

Manatees Have No Natural Predators

Manatees are one of the luckiest ocean animals in that they have no natural predators. Although crocodiles, sharks, killer whales, and alligators can kill manatees when they are underwater eating, it doesn't happen often. That's because they prefer different habitats.

What is the number one killer of manatees? ›

Death by impact kills slightly more than 50 percent of manatees killed by collisions with watercraft. Over the last ten years there has been an increase in the number of deaths caused by impact compared to propellers.

What is a predator of a manatee? ›

Manatees don't really have any real predators. Sharks or killer whales or alligators or crocodiles could eat them, but since they don't usually inhabit the same waters, this is pretty rare. Their biggest threat is from humans. And because of this, all manatee species are endangered and threatened.

How to tell if a manatee is male or female? ›

Males have genitals located closely below their navel. Females have genitals located above the anus. The anus of both males and females is located near the caudal peduncle, the tapered area before the tail. Females are also identified by the presence of a calf nursing from mammaries located under their pectoral fins.

Are manatees intelligent? ›

To conclude from the manatee's brain size that it is less intelligent than other marine mammals is more human judgment than science — the manatee's brain has proved adequate for this slow and defenseless animal to persist to present times, Reep says.

What do manatees drink? ›

These data suggest that wild manatees may require regular access to fresh, or perhaps brackish, water to meet water balance needs. In captive situations, this need is met by drinking fresh water or by eating food that is high in free water (e.g., lettuce, which is approximately 94% water).

Has a manatee ever attacked a human? ›

There are no records indicating a manatee ever attacked a human, let alone killed someone, per A-Z Animals. At worst, they may accidentally knock someone off their paddle board, but once the person is in the water, the manatee is more likely to curiously check them out rather than attack them.

How fast can manatees swim? ›

Manatees can swim up to 20 miles per hour in short bursts, but they usually only swim about three to five miles per hour.

How many manatees are left in the world in 2024? ›

The total population of these manatees is estimated at more than 13,000, with the majority of those along the coast of Florida due to concerted conservation efforts. Other countries with known populations of West Indian manatees include Puerto Rico, Mexico, Guatemala, Honduras and Costa Rica.

How do manatees give birth? ›

This means they give live birth. A manatee calf is born under the surface of the water and can be as large as 70 pounds at birth. Since they are mammals, the mother produces milk and the calf will nurse underwater. Manatees give live birth and nurse their young.

Can manatees eat fish? ›

Manatees have occasionally been seen to eat foods other than plants. Antillean manatees have been known to eat fish from nets and West African manatees have been known to eat clams (Reynolds and Odell, 1991).

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