The members of spinner dolphin pods stun and capture fish by emitting ultrasonic beams.
“Whales may use ultrasonic noise like a stun gun against fish…Working with captive Hawaiian spinner dolphins (Stenella longirostris), California University cetologist Prof. Ken Norris found that when they direct ultrasonic beams at a shoal of fish, they can stun or even kill some of them. The beams may cause the fishes’ air-filled swimbladders to resonate so intensely that their body tissues also vibrate, disorienting them.” (Shuker 2001:23)
