Amazon river dolphin

The boto is a pink river dolphin found only in South America's freshwater rivers. Unlike ocean dolphins, it has a flexible neck and can turn its head side to side. These toothed whales come in three subspecies, each living in different river systems across the Amazon and Orinoco basins.

• Its pink color comes from blood vessels near the skin's surface.
• Unlike saltwater dolphins, botos can bend their necks to look around.
• Scientists recognize three distinct subspecies in separate river systems.