River Dolphins

River dolphin is a small toothed whale that lives in fresh water. It inhabits warm rivers and lakes of Asia and South America.

Like all whales, both river dolphins and marine dolphins belong to a group of mammals called cetaceans. But the two types of dolphins differ somewhat in appearance. For example, the snout of a river dolphin measures about 1 foot long, approximately four times as long as that of most marine dolphins, and their long vision is poorly developed because they live in dark, muddy water. River dolphins are also less active than marine dolphins. River dolphins feed primarily on fish.

The largest dolphins grow up to 9 feet long, but most are smaller. The animals may be white, pink, yellow, brown, gray, or black in color. There are four kinds of river dolphins. The Amazon dolphin lives in rivers of northern South America. The Chinese dolphin is found in Dongting Lake in China. The blind Ganges dolphin inhabits rivers of northern India and Pakistan. The La Plata dolphin lives in rivers an coastal waters of eastern South America.

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