An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America

killer whale orca adult bull johnstone strait british columbia canada pacific ocean north america marine life wildlife surfacing aquatic dorsal fin cetacean nature animal sea marine ecosystem orcinus orca water splash ocean surface natural habitat behavior conservation biodiversity marine biology marine mammal predator swimming coast north pacific fishing ground whale watching sea creature environment underwater ecosystems nature reserve observations research oceanic tidal area tourism large mammals ecosystem balance travel natural wonders indigenous waters