Freshwater dolphins are found in rivers in China, India, Pakistan, and Brazil. A freshwater dolphin's snout is more tube-shaped than a sea water dolphin's.
River dolphins are nearly blind because they've evolved in the muddy water of rivers.
They can barely distinguish night and day. These dolphins locate things such as fish using sonar. They make sounds and then listen to the echoes. Freshwater dolphins are endangered because boats, pollution, and dams are destroying their habitat. Check out the adventures of the Mighty Mites in OWL Magazine each month.