Melanochromis johannii "Border"

The fish

How this cichlid is built, and everything about how it lives, eats and breeds, is shared with the species — this page doesn't repeat it.

Read the full Pseudotropheus johannii account →

Specific to Border

  • Collection locality & coordinates
  • Local coloration — best judged from the living-fish photo
  • Kept as a single-provenance line, never crossed with other collection points

Care facts below are the species' — shared with Pseudotropheus johannii.

IUCNLEAST CONCERN · 2018
CARESNOT LISTED
Scientific size4.5 in11 cm total length
Temperature75–82 °F24–28 °C
pH7.7–8.6alkaline
Hardness (GH)very hardup to 339 ppm
Depth10–59 ft3–18 m
DietAufwuchs grazer (algae, diatoms, plankton)
BreedingMaternal mouthbrooder (polygynous)~10–30 eggs
Sexual dimorphismYesStrongly reversed dichromatism: males dark blue-black with two electric-blue stripes; females and juveniles uniform yellow-orange.
PhotographsSee photosGoogle Images →

The Border population

Melanochromis johannii "Border" is the Border population of Melanochromis johannii, a geographic colour form from the Malawi coast of Lake Malawi in the south-central part of the lake. It is the same species as Melanochromis johannii, distinguished by its collection locality and local coloration; aquarists keep and breed it as a discrete, provenance-labelled line.

Colour reference: living Border fish at malawi.si

About the species

Pseudotropheus johannii, the bluegray mbuna or 'johanni', is a small rock-dwelling cichlid endemic to the eastern shore of Lake Malawi. It is a textbook example of reversed sexual dichromatism: adult males are inky blue-black ruled by two electric-blue stripes, while females and juveniles are a uniform marigold yellow-orange — so different that early aquarists took them for separate species. Long a hobby staple, it is also one of Malawi's most frequently misidentified fish, routinely confused with the near-identical 'maingano' from Likoma Island and burdened with an unsettled genus name that has bounced between Melanochromis and Pseudotropheus for half a century.

Full Pseudotropheus johannii account →

Sources

  1. malawi.si — Melanochromis johannii "Border"
  2. Eschmeyer's Catalog of Fishes — Pseudotropheus johannii (Eccles 1973), species record
  3. FishBase — Pseudotropheus johannii (Bluegray mbuna)
  4. malawi.si — Pseudotropheus johannii 'Gome' (M.K. Oliver / Stuart Grant database; data and photos after Ad Konings)
  5. The ETYFish Project — Pseudocrenilabrinae: Pseudotropheus johannii etymology
  6. USGS Nonindigenous Aquatic Species — Melanochromis johannii (blue mbuna)
  7. IUCN Red List — Melanochromis johannii "Border"