Irrawaddy dolphin
 

Scientific Name: Orcaella brevirostris
Other Names: Snubfin Dolphin
Length: 7-8.5 ft. (2.1-2.6 m.)
Weight: 200-330 lbs. (90-150 kg.)
Teeth: 62-76

Irrawaddy dolphins inhabits fresh water as well as marine water. They can travel ten miles or more up river. Like beluga whales, these dolphins also possess flexible necks and bodies. They are slow swimmers and surface with a slow, smooth roll. There have been reports of these dolphins cooperating with fishermen by driving fish into fish nets.