Killer whales can be found in a variety of marine environments since 2006.
Killer whale . Killer whales are considered a cosmopolitan species , and can be found in each of the world 's oceans in a variety of marine environments , from Arctic and Antarctic regions to tropical seas . In late 2005 , the Southern Resident Killer Whales , the population that inhabits British Columbia and Washington state waters , were placed on the U.S. Endangered Species list .