Natural Predators:
* Alligators and Crocodiles: Large reptiles pose a threat, especially to calves and juveniles.
* Sharks: While uncommon, some shark species, particularly bull sharks, are known to attack manatees.
* Large Fish: Large fish, such as barracuda, may prey on manatees, though this is rare.
Human Threats:
* Boat collisions: The most significant threat to manatees is collisions with boats, which can cause severe injuries and death.
* Habitat loss: The destruction of coastal habitats due to development and pollution is a major factor in manatee population decline.
* Entanglement: Manatees can become entangled in fishing gear or other debris, leading to injuries and drowning.
* Hunting (Historically): In the past, manatees were hunted for their meat and oil, but this practice is now largely prohibited.
It's important to note that while manatees have natural predators, the biggest threat to their survival comes from human activities.