Peter tyak t y a c k is a behavior acologist at the university of saint andrews in scotland. He has studied how sound travels in the ocean, which is quite different from what we used to on land. Sound in the ocean therefore exerts a lot of leverage. Sometimes this is good news. Consider a recent experiment by scientists working at the great barrier reef off of australia. A patch of coral reef that is dead or dying is quiet. So they placed speakers under water to play the sounds of a noisy reef. It seems to have worked, attracting lots of fish who stayed on. Peter tyak was once studying whales in the bay of fundy