Swimming in a school may help fish hear dolphins’ ultrasound clicks

at Florida State University. American shad can, and seem to use that ability to evade dolphins, which detect prey by listening for reflections of their clicks. “Very few of the fish found in the stomachs of dolphins are shad,” says Shoele’s student Yanni Giannareas.

Experiments suggest the hearing of individual shad isn’t sensitive enough to pick up on dolphin clicks. But if they swim together, this changes, Shoele says. The team’s computer model suggests the school acts as a finely tuned echo chamber for the incoming sound. The sound waves bounce off the regularly spaced fish, and those reflections interact in such a way that their energy gets concentrated in a regularly spaced pattern as well.

Wouldn't it be easier swimming in water?

Not sure what it does for the pupils though

Ha ha ha ha ha Really? This is what you spent our tax dollars on?

I mean probably the sea would be better, but if they can fill a school with water then good for them...

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