Scientists found that fish produce different sounds.
The nature of these signals depends on their purpose. Some fish make sounds when driving, the other meals. There are special signals, warning of imminent danger, in which crumbles the whole flock.
By the nature of the sound produced by the fish, you can often determine what kind of fish is nearby. And in his power for her number. Large shoals of herring "chirp"as young Chicks. Sprat produces a noise resembling a rustle of branches in the wind. Living in the Mediterranean and Black seas scieno called "singing" fish, it makes quite a loud, long, and even melodic sounds.
It is said that even Leonardo da Vinci was overheard "conversations" fish ear to vertically lowered into the water to paddle.