A croaking behavior is recorded in some species of "Mimagoniates". This behavior has a part in courtship as well. Courtship involves the male chasing and hovering near the female. As the male hovers, he will quickly swim to the surface and take a gulp of air and return, expelling the gas and making continuous, rhythmic pulses of croaking sounds, interrupted only by the male returning to the surface for more air. The fish also zigzags while hovering by swimming up and down, when the fish intends to resurface but does not. Croaking behavior may have evolved from a behavior called "nipping surface", a feeding behavior that occurs when the fish is searching for food; the fish often will gulp air when doing this. This gulping of air has no respiratory significance.