Commerson's dolphins were first described in 1767 by Philibert Commerson. As a result, this species now bears his name. He had originally sighted these dolphins in the Straight of Megellan, in South America. The Kerguelen Island population in the Indian Ocean was not known of until the 1950s.
Commerson's dolphins were originally classified in 1804 under the genus species Delphinus commersonii. Their taxonomic listing was revised in 1846 to their current classification Cephalorhynchus commersonii.
These dolphins can be found in shallow waters along the southernmost tip of South America and around the Kerguelen Islands in the Indian Ocean. Those found around the Kerguelen Islands are larger than the South American variety, and may be a subspecies. They can often be found in naturally protected waters or harbors, sometimes entering the mouths of rivers. These do
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