Melanochromis Johanni, Interruptus and Cyaernohabdos often get mixed up and sold as one or the other. Below you can see a photograph showing the different patterns and colours of each of these three similar and often confused Melanochromis Species.
Photograph © Copyright Carsten K. Larsen Used with Permission.
Top: Melanochromis Johanni
Middle: Melanochromis Interruptus
Bottom: Melanochromis Cyaernohabdos