`Eavesdropping` on groupers` mating calls key to survival
(PHYSorg.com Biology)

Eavesdropping on groupers mating in their natural habitats isn`t creepy. In fact, it`s imperative to ensuring their survival. For years, scientists have used passive acoustic monitoring techniques to study the behavior of fishes. A particular application of this technique is used to observe the reproductive cycle of fishes, including groupers.