They are found in all oceans, from the arctic and Antarctic to tropical seas, and have no natural predators.
Their prey is just as diverse as the seas they are found in, although individual populations often specialize in a certain type.
Some feed exclusively on fish, while others hunt marine mammals like seals, and even large whales.
Land animals can’t be left out of their prey either. They have been known to feed on deer and moose that try to swim between islands off the northwest coast of North America.
Even birds can fall prey to these intelligent hunters. They can actually regurgitate fish to attract birds to the surface and then eat the birds when they go for the fish.
Resident killer whales, as opposed to transient killer whales, have never been observed eating other marine mammals, but they are known to occasionally harass and kill porpoises and seals for no apparent reason.
