Benitochromis nigrodorsalis. Photo by Dave Hansen
Benitochromis nigrodorsalis is found only in a couple areas of western Cameroon, making its home in various rivers and streams. This pair bonding riverine cichlid gets its name from its black dorsal fin which contrasts its lightly colored body. At times, B. nigrodorsalis will also display a large amount of pink in the lower part of its body. When spawning or caring for their fry, the pair will become rather aggressive toward any other tank inhabitants so arrangements for tank mates should be made. An interesting note about this species is that they are bi-parental mouthbrooders. Both the female and the male take turns holding the egg/developing fry.
Benitochromis nigrodorsalis is considered endangered due to its limited distribution and commercial farming surrounding its habitats. There isn't much information about this species but if you think you might be interested in keeping these endangered cichlids, take a look at the Species Article by Diane Tennison. The article also has more great photos.