Orca (Orcinus orca) Bull surfacing in Tracy Arm, southeast Alaska, USA.

Orca (Orcinus orca) Adult bull surfacing in the calm waters of Southeast Alaska, USA. Note the exceptionally tall dorsal fin - the field diagnostic for a mature male Orca. (rr)

Orca (Orcinus orca) Transient bull surfacing (fluke detail) in Stephens Passage, Southeast Alaska, USA. Pacific Ocean.

Orca (Orcinus orca) pod surfacing Chatham Strait, southeast Alaska, USA.

Two Humpback Whales (Megaptera novaeangliae) surfacing in Southeast Alaska, USA. Pacific Ocean.

Killer Whale (Orca, Orcinus orca) breaching in Lynn Canal, Southeast Alaska, USA. Pacific Ocean

Young Killer Whale (Orcinus orca) power lunging in Southeast Alaska, USA. Pacific Ocean.

Orca (Orcinus orca) pod surfacing calm waters in Chatham Strait, southeast Alaska, USA.

Adult Orca Bull, Orcinus Orca, surfacing in front of Mt. Baker, San Juan Islands, Washington

Orca (Orcinus orca) Young surfacing in Chatham Strait, southeast Alaska, USA.

Orca (Orcinus orca) surfacing near whale watching yacht in the calm waters of Southeast Alaska, USA. (rr)

Orca (Orcinus orca) Bull surfacing in Chatham Strait, southeast Alaska, USA. T

Resident Orca (Orcinus orca) - also called Killer Whales - in tight pod formation in Stephen's Passage, Southeast Alaska, USA. Pacific Ocean.

Transient Killer whale (Orcinus orca) surfacing, Monterey Bay, California, USA

Killer whale, Orcinus orca, surfaces in calm sea Monterey, California, USA

Adult humpback whale (Megaptera novaeangliae) fluke-up dive in Frederick Sound, Southeast Alaska, USA. Pacific Ocean.

Adult Humpback Whale (Megaptera novaeangliae) breaching off Point Adolphus in Southeast Alaska, USA. Pacific Ocean.

Female transient killer whale (orcinus orca) tail slap, tail lob, fluking, National marine sanctuary, Monterey bay, California Pacific ocean, USA.

Transient, Killer whale, Orcinus orca, Male surfacing with carcass wrapped around his dorsal fin, carcass was either a bull California sea lion, Zalophus californianus or a Northern elephant seal, Mirounga angustirostris, Monterey bay, California, USA, Pacific

Transient Killer whale (Orcinus orca) spy hopping Monterey Bay, California, USA

Killer whale, Orcinus orca, breaching Monterey, California, USA

Transient Killer whale (Orcinus orca) eating Common murre / guillemot (Uria algae) Monterey Bay, California, USA

Killer whales, Orcinus orca, moving in parallel to whale watching boat with people observing pod Monterey, California, USA

Female transient Killer whale (Orcinus orca) feeding on Grey whale calf (Eschrichtius robustus) intestines visible, Monterey Bay, California, USA

Adult Bull Orca (Orcinus orca) surfacing in Southeast Alaska, USA. Pacific Ocean.