This species can be distinguished from the similar M. cyaneorhabdos by the overall black colouration of dominant males, as opposed to the more blueish patterning of cyaneorhabdos. It is sometimes sold as "electric blue johanni". Do not keep it with other Melanochromis species as they may hybridise….

M. cyaneorhabdos was formerly known as M. "maingano", after a village located on the shore off which it is found. It can be distinguished from the similar M. johanni by the overall blueish colouration of dominant males, as opposed to the more black patterning of johanni. It is sometimes incorrectly sold as "electric blue" johanni.

Do not keep it with other Melanochromis species as they may hybridise….

Despite its ready availability, M. auratus is not recommended for the beginner due to its intolerant nature. Do not keep it with other Melanochromis species as they may hybridise. Male fish can revert to the golden colouration when stressed, and older females often darken with age until they superficially resemble males….

This species was formerly classified as Pseudotropheus greshakei and Metriaclima greshakei and is still named as either of these by many sources. The genus name Maylandia is now used to describe all former members of the 'zebra' group of Pseudotropheus.

An albino form of this species exists in aquaria and is occasionally available….

There is some confusion regarding the taxonomy of this species and its congener L. stappersi. L. stappersi was originally regarded as a subspecies of perspicax but is now considered a distinct species. It is not often seen in the hobby….

This species is very similar to L. ocellatus and often carries the trade name "black ocellatus". It is found living alongside L. stappersi in nature….

For aquarists perhaps more useful are the subtle differences in colour pattern with P. simulans differing from both P. innesi and P. axelrodi in possessing a greener (vs. bluer) lateral stripe which covers more (vs. less) of the eye/head and extends to the caudal-fin base (vs. terminating anterior to caudal-fin base), a lesser (vs. greater) amount of relatively duller (vs. brighter) red pigmentation on the flanks.

The taxonomic history of all three species is complicated with earlier authors such as Géry (1960, 1977) ten…

This fish was originally thought to be a morph of L. ocellatus but has now been described as a distinct species. It is still occasionally offered for sale as "pearly ocellatus" and may also be seen under the invalid name L. meleagris….

This species can be found in most dealers' tanks and is one of the best choices for the newcomer to fishkeeping, being attractive, hardy and inexpensive. As virtually all the fish sold in the trade have been captive bred they tend to be relatively unfussy regarding water chemistry and diet.

It's occasionally confused with N. lacortei, which is currently the only other species in the genus. They can easily be told apart by looking at the eye of the fish in question, as the male N. l…

Type locality is the Río Calima in Valle del Cauca department, western Colombia.

The Calima is a major tributary within the Río San Juan system and N. lacortei is considered endemic to this drainage.