sentences:  Although not closely related, they have sometimes been compared to piscivorous "Bathybates" cichlids of Lake Tanganyika.There are currently six recognized species in this genus, although the naming of these cichlids has been complicated.For example, FishBase states that "Rhamphochromis lucius" is almost certainly a synonym of "R. woodi" whereas the Catalog of Fishes states that it is a synonym of "R. esox".