Description
English: Pacific white-sided dolphins (Lagenorhynchus obliquidens)
The original NOAA image has been modified by adjusting tone and brightness, and cropping.
Date 27 May 2014, 17:00:26
Source http://www.nmfs.noaa.gov/pr/species/mammals/cetaceans/whitesideddolphin_pacific.htm
Author NMFS Southwest Fisheries Science Center (NOAA)
Source: https://commons.wikimedia.org/wiki/File:Pacific_white-sided_dolphins_(Lagenorhynchus_obliquidens)_NOAA.jpg

The Pacific white-sided dolphin (Lagenorhynchus obliquidens) is a very active dolphin found in the cool to temperate waters of the North Pacific Ocean. The Pacific white-sided dolphin was named by Smithsonian mammalogist Theodore Nicholas Gill in 1865. It is morphologically similar to the dusky dolphin, which is found in the South Pacific. Genetic analysis by Frank Cipriano suggests the two species diverged about two million years ago. Though both are traditionally placed in the genus Lagenorhynchus, molecular analyses indicate they are closer to dolphins of the genus Cephalorhynchus. The new genus Sagmatias has been proposed for these species. Order: Artiodactyla, Infraorder: Cetacea, Family: Delphinidae, Genus: Lagenorhynchus, Species: Lagenorhynchus obliquidens (Gill, 1865).