Orcas, also known as killer whales, have a diverse diet that varies depending on their ecotype and geographical location. They are apex predators and eat a wide range of prey including:

• Marine mammals such as seals, sea lions, dolphins, and even calves of larger whales like blue whales and humpbacks.
• Fish, with some populations specializing in salmon, particularly Chinook salmon.
• Squid and other cephalopods.
• Seabirds and turtles occasionally.
• Sharks, including great whites, where orcas often target the nutrient-rich liver.
• Other prey like sea otters, penguins, and sometimes unusual prey like moose have been reported.

Orcas exhibit specialized feeding habits based on their ecological niche. For example, resident orcas in the Pacific Northwest primarily eat fish, particularly salmon, while transient orcas focus on marine mammals. Offshore orcas may feed on fish and sharks. Different hunting techniques include tearing flesh, shaking prey to break it into smaller pieces, and cooperative hunting strategies within pods. Their feeding behavior also plays a crucial role in social bonding and cultural transmission within pods as orcas often share prey and teach younger members how to hunt. In summary, orcas eat marine mammals, fish, squid, seabirds, and occasionally turtles and sharks, with diets varying by region and ecotype, showcasing their adaptability and intelligence as hunters.