The Dusky Dolphin is a highly gregarious and acrobatic dolphin found in coastal waters in Southern Hemisphere. The scientific name of the Dusky Dolphin is Lagenorhynchus obscurus. The largest Dusky Dolphin is 210cm in length and 100kg in mass. The population of these dolphins is unknown. These dolphins are first discovered by John Edward Gray in 1825. Their throat and belly are white. They can move over great distances at about 1440km. However it is not believed that they follow a migatory pattern.