Lacking the floor of the mouth: a case study on Coptodon zillii (Cichlidae) from Shatt Al-Arab River, Basrah, Iraq

Abstract

A single case of double mouth monstrosity was observed and examined in the cichlid fish Coptodon zillii collected from Shatt Al-Arab River, Basrah, Iraq on 15 May 2018. Instead, add the followings,"The floor of the mouth was ruptured, creating an extra mouth opening beneath the normal mouth. An injury may have caused this condition. Morphological examination indicates that the fish had lived with the abnormality for some time.