In the wild, males build tall, pyramidal sandcastle bowers on the open sand floor. Populations are dense, with males building their nests in large arenas and non-breeding individulas never straying very far. Because of the intense competition for spawning sites, males do not leave their nests while courting females. Spawning occurs throughout the year. This cichlid does not make a yearly migration to the breeding grounds as their breeding and foraging grounds are the same.
This cichlid, as are C. cyclicos and C. thinos, is not a characteristic utaka and is only nominally placed in the genus Copadichromis due to its protrusible mouth. In time, these 3 species will be assigned their own genus. They constitute a lectotype of Copadichromis eucinostomus and differ primarily in the size and shape of the mound and spawning dish of males' bowers. These three species appear to be closely related to Nyassochromis prostoma.