However, there are some exceptions depending on the species and age:
* Orcas (killer whales): These are the only known natural predator of both dolphins and whales. Orcas are highly intelligent and social animals that are known to hunt in groups, making them formidable predators. They can even prey on large whales like humpback whales.
* Sharks: While most sharks are not a threat to adult dolphins and whales, some larger species like great white sharks can occasionally prey on young or vulnerable individuals.
* Other whales: Some whales, like sperm whales, are known to prey on smaller dolphins.
* Humans: Humans are a significant threat to dolphins and whales through activities such as fishing, pollution, and climate change.
It's important to remember that dolphins and whales are vulnerable to threats like disease, habitat loss, and entanglement in fishing gear, even though they have few natural predators.