Do Actinopterygii have lungs?
Some ray-finned fishes, such as the gars of North and Central America and Cuba , are secondary air-breathers, who have evolved an alveolar lung to survive in their low-oxygen environment.
Some ray-finned fishes, such as the gars of North and Central America and Cuba , are secondary air-breathers, who have evolved an alveolar lung to survive in their low-oxygen environment.
