However, there are some instances where they can be vulnerable:
* Orcas (Killer Whales): Orcas are the most well-known predator of whales, especially smaller species like dolphins and porpoises. They can also hunt larger whales like gray whales and even humpback whales, particularly calves.
* Sharks: Some large shark species, like great whites and tiger sharks, can prey on whale calves or injured adult whales. However, this is less common than orca predation.
* Polar Bears: In the Arctic, polar bears can hunt young bowhead whales that are stranded on ice.
* Humans: Humans are a significant threat to whales through hunting, fishing bycatch, habitat destruction, and pollution.
Important Note: It's crucial to remember that whales are generally not preyed upon by other animals in the same way that smaller animals are. They are too large and powerful for most predators to successfully attack.