Killer whales, also known as orcas, are the largest members of the dolphin family. They can be found in oceans around the world. Killer whales live in tightly-knit family groups called pods and have three distinct types - residents, transients, and offshores. Residents mainly eat fish and stay in coastal areas while transients prey on other marine mammals and have a wider range. Killer whales communicate through clicks, whistles, and pulsed calls. They are long-lived, highly intelligent predators at the top of the ocean food chain.