* Orcas (Killer Whales): These are the most significant threat to sea otters, especially in areas where orca populations are high.
* Great White Sharks: While not as common as orcas, great white sharks can occasionally prey on sea otters, particularly in areas where their ranges overlap.
* Other Sharks: Other shark species, such as salmon sharks and leopard sharks, may also prey on sea otters, though less frequently.
However, it's important to note:
* Sea otter populations are typically limited by other factors, like habitat loss and degradation, disease, and pollution, rather than predation alone.
* Humans also play a role, through fishing practices that can impact their prey and oil spills that can contaminate their environment.
While sea otters have a few predators, they are not a primary food source for any animal. Their vulnerability comes more from human activities and environmental factors.