The eastern North Pacific is home to 8 species of dolphin (including orcas/killer whales), 3 of which have been recorded by our hydrophones. Many eastern North Pacific dolphin species prefer deep, offshore waters, and so have not come within range of our hydrophones.

Pacific White-sided Dolphins

Pacific white-sided dolphins are very social and gregarious. They travel in groups of 10 to 100 individuals, and have even been seen in groups of over 2000. They often spend time with other marine mammal species, including Steller sea lions, Dall’s porpoises, resident orcas and humpback whales in coastal British Columbia, and Risso’s dolphins, northern right whale dolphins and short-finned pilot whales offshore. They are opportunistic predators; they eat at least 13 different...