* Killer whales (Orcas): Killer whales are top predators in the ocean and are known to hunt dolphins. They typically target smaller species, such as the Pacific white-sided dolphin and the bottlenose dolphin.
* Humans: Humans are also predators of dolphins. They hunt dolphins for their meat, oil, and skin. In some cultures, dolphins are also caught and kept in captivity for entertainment purposes.
* Other dolphins: In some cases, other dolphins may prey on smaller dolphin species. For example, the Risso's dolphin has been known to prey on the Pacific white-sided dolphin.