Fish have many methods of communicating: for example, they use livery colors, or release chemicals. And some make sounds. It is well known by those who live near the sea and, on summer nights, almost feel the house vibrating: the love song of a 25 cm long fish, the cadet fish (Porichthys notatus), which emits a buzz to attract females and let them lay eggs. It produces such a noise that, to avoid deafening even itself, it has developed a trick: while some nerve impulses signal the muscles around the swim bladder to vibrate and generate sound, others inhibit the sensitivity of the ear.

Chatty fish. The researchers then recorded sounds and recalls produced by croaker, eels, monkfish and many other fish, compared to the noise of thousands of voices together. The fish are therefore more "talkative" than you think and, generally, the right hours for the chatter are early in the morning and at dusk.