Cetacean echolocation is a biological sonar used by some marine mammals, such as dolphins and whales, to navigate and hunt in the ocean. These animals produce sound waves that travel through water, bouncing off objects and returning to them. By analyzing the returning echoes, cetaceans can determine the size, shape, distance, and even the texture of objects around them. This ability is crucial for survival in dark or murky waters where visibility is limited. Echolocation helps cetaceans locate prey, avoid obstacles, and communicate with each other. It showcases the remarkable adaptations of these animals to their underwater environment.