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March 3, 2025
Pacific white-sided dolphins are among the ocean’s most playful and charismatic creatures. Their sleek, black-and-white patterned bodies, energetic behaviour, and curious nature make them a fan favourite on our tours. Let’s dive into some common questions about these remarkable marine mammals.
What Are Pacific White-Sided Dolphins?
The Pacific white-sided dolphin is a highly social and acrobatic marine mammal found in the temperate waters of the North Pacific Ocean. These dolphins are easily recognizable by their striking colouration: a dark grey to black back, light grey sides, and a white belly, along with distinct white patches on their sides and a stripe extending from their eyes to their dorsal fin. They grow to approximately 6-8 feet (1.8-2.4 meters) in length and weigh between 300-400 pounds (135-180 kilograms). Known for their playful nature, Pacific white-sided dolphins often travel in pods ranging from a few individuals to several hundred.
In British Columbia (BC), Pacific white-sided dolphins are common in coastal waters. They thrive in the nutrient-rich waters of the Pacific Northwest, feeding on a variety of small schooling fish and squid. These dolphins play an important role in BC’s marine ecosystem and are always an exciting species to encounter on whale-watching tours in the region, making them a favourite among wildlife enthusiasts and researchers alike. The best place to watch Pacific white-sided dolphins is in Telegraph Cove, where it is not uncommon to see large pods travelling together. We also see a variety of porpoises in our waters, which are not dolphins but commonly mistaken as some!
How Many Pacific White-Sided Dolphins Are Left?
While exact population numbers are difficult to pinpoint, it is estimated that several hundred thousand Pacific white-sided dolphins are currently in the wild. Their population is considered stable and, as such, are not currently listed as threatened or endangered. However, like many marine species, they face challenges from habitat degradation, fishing bycatch, and climate change, which could impact the population in the future.
Are Pacific White-Sided Dolphins Friendly?
Yes! Pacific white-sided dolphins are known for their playful and social behaviours. They often approach boats to ride bow waves and leap out of the water, seemingly for fun. These dolphins live in large pods, sometimes up to hundreds of individuals, and their friendly and curious nature makes them a delight to observe in the wild.
Where Do Pacific White-Sided Dolphins Live?
Pacific white-sided dolphins inhabit the temperate waters of the North Pacific Ocean. Their range extends from the coasts of North America to Asia, including regions off British Columbia, Alaska, Japan, and Russia. These dolphins prefer offshore waters but are also frequently seen near coastal areas with abundant food. They primarily feed on small schooling fish, such as herring, anchovies, and squid, and they use cooperative hunting techniques to herd their prey.
Are White-Sided Dolphins Rare?
Pacific white-sided dolphins are not considered rare. In fact, they are one of the most abundant dolphin species in the North Pacific. Their large populations and wide distribution make them frequently visible in their natural habitat, especially in areas like British Columbia, where marine biodiversity is high.
What Are the Predators of the Pacific White-Sided Dolphin?
The primary predators of Pacific white-sided dolphins are large sharks and killer whales (orcas). These apex predators occasionally hunt dolphins, although the speed and pod size of Pacific white-sided dolphins provide them with some protection, reducing the risk of predation.
How Fast Can Pacific White-Sided Dolphins Swim?
Pacific white-sided dolphins are incredibly fast swimmers, reaching speeds of up to 35 miles per hour (56 kilometres per hour). Whether they’re chasing prey or simply travelling with their pod, their streamlined bodies and powerful tails allow them to move effortlessly through the water.
Want to see what else is in BC’s waters?
We have discussed Pacific White-Sided Dolphins in Episode 9 of the Prince of Whales PODcast, so if you want to learn more fun-facts about these beautiful creatures, you can check it out here!
