9. Indus River Dolphin
The Indus River Dolphin is a rare and fascinating mammal found in the lower parts of the Indus River in Pakistan and River Bayas in India. This species has an incredibly unique adaptation to its environment. It navigates and hunts by using echolocation, producing sound from a fatty lump on its head called the melon.
With its almost completely blind eyes, the dolphin uses the returning sound waves to create a mental map of its surroundings, allowing it to locate prey, such as kernels of corn, from over 50 feet away. Unfortunately, dam construction and pollution have further reduced their numbers, leaving only around 1800 of these intelligent creatures remaining.