Killer Whales or Orca (Orcinus orca) is the largest species of the dolphin family. Actually orca classified as a dolphin. However, because orca is very large, many call it a whale. The species is found throughout the ocean, from cold regions such as Arctic and Antarctic to warm temperate zones. Killer whales are the top predators in the ocean, most populations eat fish, while other populations eat marine mammals such as sea lions, seals, walruses to large whales. even on October 4, 1997 off the California coast of the United States, a group of whale observers traveling on Farallon Island have recorded a unique incident of killer whales attacking an adult white shark and then eating the shark. A statement saying that the Shark is a predator that controls the top food chain in the sea was broken because of the event. Killer whales live in groups, they also often hunt together. The IUCN establishes the conservation status of killer whales is unknown, as some killer whales are of the same type. Some local populations are already threatened due to habitat loss, pollution effects, and capture for marine mammal parks, and sometimes conflicts with fishermen
