The lungs soon start to develop and are used as an accessory breathing organ.

This way are cerata used for breathing as a specialized breathing organ.

Dorsal skin also partly serves as a breathing organ.

Males have a modified breathing organ (described in the next section) with which they make sound during courtship.

They also have a large, accessory breathing organ composed of modified gill arches.

The lungs are a pair of cone-shaped breathing organs in the chest.

The lungs are a pair of cone-shaped breathing organs that are found within the chest.

This last pair of legs is usually held inside the carapace, in the cavity containing the breathing organs.

Breathing is the process that moves air in and out of the lungs or oxygen through other breathing organs.

A number of fish have evolved so-called accessory breathing organs that extract oxygen from the air.