When toothed whales like the killer whale, the sperm whale and [P 007 / dolphins] hunt forike the killer whale, the sperm whale and dolphins hunt for prey, they use a process called 'echolocation.' This process is similar to the one used by bats to find their way in the dark. They can direct a clicking sound at an object, and pick up the returning sound waves, using them to determine the position of the object.licks can be distinctly heard. A dolphin can swim blind-folded and never crash into the aquarium wall by using echolocation to determine where the wall is in relation to themselves.