[2]Pseudocrenilabrus nicholsi is a species of cichlid native to the Congo Basin in Africa.

This species can reach a length of 8.5 centimetres (3.3 in) SL.

[3] The specific name honours the American ichthyologist John Treadwell Nichols (1883–1958) who was curator of fishes at the American Museum of Natural History.

[4] Males of this species usually display brighter colors and larger fins than females, particularly while breeding, showing sexual dimorphism.

Pseudocrenilabrus nicholsi has a crucial impact on its environment by helping to maintain the ecological balance in the Congo Basin through its feeding patterns and reproduction practices.