The Kribensis (Pelvicachromis pulcher), also known as the krib, the rainbow krib and the rainbow cichlid, is a small freshwater fish native to Africa. While mainly found in the rivers of Nigeria and Cameroon, they are also listed as an invasive species in Hawaii.
In the wild, they primarily inhabit rivers and streams, but are only found in areas that have dense vegetation. They inhabit both calm and fast moving waters, and will normally be found living in small caves that have excavated underneath plants.
They stay relatively small in the home aquarium, with males growing to about 4 inches (10 cm) in length. Females are quite a bit smaller, and their bodies are much rounder than the males. They will usually only grown to about 3 inches (7.5 cm) in length, though it’s not uncommon for them to be a fair bit smaller.