Melanochromis are typically small, slim but muscular fishes with lengthwise stripes of black, yellow and blue. They usually display strong sexual dichromatism. They are very aggressive, particularly amongst conspecifics and similarly patterned heterospecifics (such as Julidochromis). Thus, though they are popular aquarium fishes, they are not suited for beginners and community tanks.
From Wikipedia, the free encyclopedia, Melanochromis
Photograph © Copyright Carsten K. Larsen Used with Permission