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Canada's Species   Mammals

Sei Whale

Balaenoptera borealis

Similar to the fin whale but smaller, this rorqual is distinguished by its relatively short pectoral flippers and large dorsal fin, which is situated well forward. Sei whales often swim for great distances only a few metres under the surface, and migrate in much the same pattern as other rorquals, feeding in arctic or temperate waters in summer and making for warmer subtropical seas in winter, where breeding takes place. Because they will readily switch to fish after most krill has been consumed, sei whales are able to stay in some areas longer that many other krill-eating species like the blue whale.

Map of Sei Whale in Canada
Distribution of Sei Whale in Canada

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