High Quality Content by WIKIPEDIA articles! Pelvicachromis pulcher is a freshwater fish of the cichlid family, endemic to Nigeria and Cameroon. The species is popular amongst aquarium hobbyists, and is most commonly sold under the name kribensis, although the species has other common names, including various derivatives of kribensis: krib, common krib and rainbow krib, along with rainbow cichlid and purple cichlid. Originally P. kribensis, its scientific name was changed to P. pulcher. Pulcher is Latin for "beautiful". The species is a popular cichlid for the aquarium.