Increased sightings of orca in Alaska are raising questions. These four animals, part of a group of 13, were photographed on 20th August swimming in the Beaufort Sea off the coast of Barrow. Scientists say "the killer whales may be mammal-eating orcas that follow gray whales to northern waters."
Read more here:http://www.adn.com/2012/09/10/2619704/increased-sightings-of-orcas-in.html
Whale surveys spot orca in the Alaska Arctic - "Orca have been seen before in the Arctic ocean but are considered unusual that far north."