The Atlantic White-Sided Dolphin

The Atlantic white-sided dolphin (Lagenorhynchus acutus) is a highly gregarious species, occasionally being sighted in groups of up to 1,000.


Life span
Up to 25 years

Body length: up to 8 feet, Weight: as much as 400 lbs.

Physical Description
Atlantic white-sided dolphins have a black/dark upper surface, grey flank stripe, white patch below the fin, yellowish patch on tail stock, and a white underside. They also have a tall dorsal fin.

Atlantic white-sided dolphins inhabit the north Atlantic and Arctic oceans, in cold temperate and polar regions.

Atlantic white-sided dolphins feed on fish, squid and prawns.

Behavior of Dolphins
Atlantic white-sided dolphin live in groups of 5-50 (although up to 1,000 has been reported) and are often seen in the company of other species.

Atlantic white-sided dolphins are known to associate with white-beaked dolphins, pilot whales and bottlenose dolphins as well as fin whales and humpback whales.White sided dolphin

Highly social animals, Commerson’s dolphins are often seen associating with the Burmeister’s porpoise, and the Peale’s and Chilean dolphins.

Fraser’s dolphins are often seen in mixed groups, swimming with other species of tropical toothed whales and dolphins.

False killer whales can be seen in the company of other species including bottlenose dolphins.

Hourglass dolphins can be found with many other cetaceans including fin whales and long-finned pilot whales.

Southern right-whale dolphins feed on a variety of fish species and squid and are often seen associating with dusky and hourglass dolphins, and pilot whales.

Conservation status
They are not listed by the IUCN. Global threats include hunting, prey depletion, pollution and entanglement in nets.

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