Chirping Tetra

Croaking Tetra

Croaking Tetra or Chirping Tetra is a common name given to certain species of tetra within the genus Mimagoniates such as M. inequalis., M. lateralis, and M. microlepis. They are have a supplementary breathing organ located above the gills which makes a faint chirping sound when these fish come to the surface to gulp air. It also plays a role in courtship as the male chases and hovers near the female while taking gulps of air and expelling it to make a rhythmic noise. Croaking behavior may have evolved from a behavior called "nipping surface", a feeding behavior that occurs when the fish is searching for food. This gulping of air has no useful respiratory function.


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