Certain species of dolphins use echolocation to find their prey: they emit ticking sounds and then receive echoes reflected by distant objects in the water  Marine biologists speculate that these ticking sounds may have another effect: the dolphins use unusually high-frequency ticking
Dolphins can use echolocation to find not only long-distance prey, but also middle-distance prey
 The sound overloads the prey's senses, which stuns prey at close range