What is Killer whale?
{{Taxobox | name = Orca | image = Killerwhales jumping.jpg | image_caption = Orcas near [[Unimak Island]], eastern [[Aleutian Islands]], [[Alaska]] | image_width = 280px | regnum = [[Animalia]] | classis = [[Mammalia]] | ordo = [[Cetacea]] | subordo = [[Odontoceti]] | familia = [[Delphinidae]] | genus = '''''Orcinus''''' | species = '''''Orcinus orca''''' | binomial_authority = [[Carolus Linnaeus|Linnaeus]], 1758 | range_map = cetacea range map Orca.PNG | range_map_caption = Orca range (in blue)}} '''Killer whales''', or '''Orcas''' (''Orcinus orca'') is a toothed whale and largest dolphin. They have [[black]] skin with [[white]] patches. They are found in all the world's oceans, from the cold of the [[Arctic]] to the [[tropical]] seas. They live in pods, which are family groups. == Lifestyle == Like all [[Toothed whale|toothed whales]], they are [[Carnivore|carnivores]]. Killer whales are [[Apex predator|apex predators]] and they hunt in family groups called 'pods'.<ref name=Mead>Mead, James G. & Brownell, Robert L. Jr. 2005. Order Cetacea (pp. 723-743). In Wilson, Don E. and Reeder, DeeAnn M. eds. ''Mammal species of the World: a taxonomic and geographic reference''. 3rd ed, Baltimore: Johns Hopkins University Press, 2 vols. {{ISBN|978-0-8018-8221-0}}. OCLC 62265494.</ref> Members of the pod work together to surround their prey. Killer whales eat many different kinds of prey, such as [[shark]]s, [[Pinniped|seals]], [[Sea lion|sea lions]], [[dolphin]]s, [[Whale|whales]], [[penguin]]s, [[Gull|seagulls]], [[squid]], [[Octopus|octopuses]], [[Stingray|stingrays]], [[Crab|crabs]] and [[Sea turtle|sea turtles]]. In 1997, the first known killer whale attack on [[great white shark]]s was documented off the coast of [[San Francisco]]. There are several different types of ''Orca'', each of which has different living and prey habits. They do not interbreed and seems to be [[subspecies]] or even separate species.<ref>Pitman, Robert; Robertson, Kelly M. & Leduc, Richard G. 2008. Mitochondrial sequence divergence among Ant