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

orca killer predator whale cetacea cetacean mammal animal sea pacific oceanic ocean water underwater marine wild aquatic wildlife sea life northern hemisphere odontocete odontoceti toothed delphinidae north america north american united states dorsal fin alaska alaskan surface male