In front of the dolphin's blowhole, in the area we call our forehead, is their melon. The melon consists of fatty tissue and fluid and serves as the lens through which sound is focused during echolocation. Echolocation is seeing with sound, much like sonar on a submarine. They can only echolocate in the water and not through the air. Sound waves are created in the nasal sacs and focused through the melon at various frequencies, allowing the dolphin to "see" with sound.⁠ ⁠ The sound waves travel through the melon and into the water and bounce off objects of interest (like an echo underwater, hence the name). The sound waves then travel back to the dolphin and are received by their lower jaw, which is also filled with a fatty fluid. The sound waves travel from the jaw to the inner ear, to the nerves connected directly to the brain, where they translate the sound into an image. ⁠ ⁠ ⁠ _____⁠ ⁠ Echolocation works similarly to an ultrasound. It gives a dolphin the capacity to explore their e...