Do manatees have any predators?
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.
In addition, manatees are simply too large to be attacked by other animals. There have been a few rare incidents of manatees and manatee carcasses being predated upon by sharks and alligators, but they have mostly been small manatees or calves. The manatee's only real predator is humans.
Shark attacks on manatees are extremely rare. That does not mean that sharks do not eat manatees. Actually, West Indian Manatees are occasionally eaten by large predators such as tiger sharks.
There are two major threats: loss of habitat and collisions with boats and ships. As new developments are built along waterways, natural nesting areas are destroyed. Sewage, manure, and fertilizer run-off enters the water and causes algal blooms. Some of this algae is toxic and can kill manatees if they eat it.
No, they don't. Actually, while alligators may bite the satellite tags attached to manatees and occasionally prey on manatee calves, they don't ordinarily bother manatees. Attacks by alligators are very rare, and boat strikes still remain the prime cause of death among adult manatees.
While sharks, killer whales, crocodiles and alligators can prey on unsuspecting manatees while grazing under the water, this is very rare because of difference in habitat. The predators prefer to dwell in deeper waters and are not usually found in the marshy and often salty waters where manatees reside.
To date, there has never been a record of manatees attacking any humans or even other animals. The daily itinerary for manatees is very simple; they spend several hours swimming and grazing on seagrasses and water vegetation every day.
Preserving their natural behavior. You are not supposed to touch manatees because that can trigger a change in behavior in the animals. Manatees are already an imperiled species because of their easygoing and curious nature, which predisposes them to several risks including being mowed down by speed boats.
In fact, they are curious animals that enjoy human interaction and are quite happy to relate with and be around humans. That's why it's quite common for manatees to approach swimmers or divers for a belly rub or close contact. Manatees are not known to attack or harm anything.
Primarily because of the manatee's large size and slow movements, they don't fit well into the prey lists for sharks. Although manatees can be found in salt water and some sharks in brackish and fresh water (where most manatees spend their time), larger sharks are less common in manatee habitat.
References
- https://swimmingwiththemanatees.com/why-you-not-touch-manatees/
- https://rockonrr.com/are-manatees-dangerous-here-is-what-i-found-out/
- https://swimmingwiththemanatees.com/do-manatees-have-natural-predators/
- https://swimmingwiththemanatees.com/do-sharks-eat-manatees/
- https://swimmingwiththemanatees.com/do-alligators-bother-manatees/
- http://savethemanatee-archive.org/info_alligators_sharks.html
- https://oceantoday.noaa.gov/manatees101/welcome.html
- https://oceantoday.noaa.gov/endoceanmanatees/
- https://swimmingwiththemanatees.com/manatees-dangerous-to-swim/
- http://savethemanatee-archive.org/faq_predators.html