La Plata River Dolphins

The Franciscana dolphin, which is also called the La Plata River dolphin, is one of the rarest dolphins in South America. Due to its rarity, there is little known about it. It grows to be between 4 and 6 feet long, and weighs up to 115 pounds, and its body is a grayish brown color. Even though sightings of the Franciscana dolphin are scarce, it can be found in the Doce River, in Brazil, and the Peninsula Valdes in Argentina. It can also be found in the coastal waters of Uruguay. This is the only species of river dolphins that can be found in salt water.