• Class: Mammalia
• Distribution: All oceans and most seas, but prefer higher latitudes and coastal areas 
• Length: About 800 - 1000 cm
• Weight: About 9000 kg
• Food: Meat

The killer whale or orca (Orcinus orca) is a toothed whale belonging to the oceanic dolphin family, of which it is the largest member. Killer whales are apex predators, meaning that they themselves have no natural predators. They are sometimes called the wolves of the sea, because they hunt in groups like wolf packs. Killer whales have the second-heaviest brains among marine mammals (after sperm whales, which have the largest brain of any animal)