Especially the in the lake of Great Rift Valley in East Africa, such as Lakes Tanganyika and Malawi, a great variety of cichlids species and some very interesting feeding specializations have developed. There one finds cichlids that graze on the algae growing on rocks(the so called aufwuchs eaters ), and there are even some that bite off and eat the scale of other fish. Other African lakes as well as Western African rivers, also have cichlid of different genera, species, and color varieties.