Smithsonian Institution
Smithsonian National Zoo: Zoogoer Magazine: River Dolphins of No Return
Robin Meadows's article, "River Dolphins of No Return," focuses on the four types of dolphins worldwide that live only in rivers (Amazon River dolphin, Yangtze River dolphin, Indus and Ganges river dolphins).
Other
Shark Friends Dolphin and Porpoise Page
Dive down deep with these adorable sea creatures and users discover more about them. Includes information on all different types such as the Humpback, Orca, Spinner and many more!