Amazon River Dolphin
Pink-colored and highly adapted to river life, these dolphins navigate through some of Earth’s muddiest waters. The Amazon and Orinoco river systems contain heavy sediment that blocks nearly all light. These dolphins produce broadband clicks between 30-100 kHz that penetrate the murk. They use sound to create mental maps of submerged trees, river channels, and hidden prey. Their exceptional maneuverability takes full advantage of echolocation. They twist through flooded forests during rainy seasons to find fish trapped among the trees.