Hearing

Opening of gill cavities.

Hearing is one of the five senses of man and animals, which consists in perceiving sounds. In fish, hearing is a very important meaning which allows them to detect the noises of their environment and to react accordingly.

Fish have external and internal hearing organs. The external hearing organs are located on each side of the head, near the mouth, and are called the "lower jaws". These organs are covered with fine and sensitive skin which vibrates when touched by sound waves. The internal hearing organs are in the head of the fish and are formed by a spongy bone called "lapilli".

The hearing of fish is very sensitive and allows them to detect the noises of their environment at large distances. For example, fish fish are known to be particularly sensitive to sounds and can detect calls from their fellows at distances up to 1 km.

Fish use their hearing to communicate with each other and to detect predators. Some species of fish also use their hearing to find their way in their environment and to find food. For example, migratory fish use their hearing to follow the sounds produced by currents and tides, which allows them to navigate in the ocean.

It is important to take into account the hearing of fish when creating an aquarium, because noises and vibrations can be stressful for fish and affect their behavior. It is therefore recommended to create a calm environment and not to place the aquarium near noise sources such as television or stereo. In addition, it is important not to strike on the aquarium or to move it suddenly, as it can cause stress for fish.