Perissodus microlepis "Kipili"

Kipilikee-PEE-lee (approx.)

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 Perissodus microlepis account →

Specific to Kipili

  • 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 Perissodus microlepis.

IUCNLEAST CONCERN · 2025
CARESNOT LISTED
Scientific size4.3 in11 cm total length
Temperature75–81 °F24–27 °C
pH8.6–9.3alkaline
Depth3–230 ft1–70 m
DietLepidophage (scale-eater)
BreedingBiparental mouthbrooder200+ eggs
Sexual dimorphismYesSexes are very similar externally and hard to separate on appearance; the species' notable polymorphism is the left/right mouth asymmetry (laterality) rather than a male/female difference
PhotographsSee photosGoogle Images →

The Kipili population

Perissodus microlepis "Kipili" is the Kipili population of Perissodus microlepis, a geographic colour form from the Tanzania coast of Lake Tanganyika in the north-central part of the lake. It is the same species as Perissodus microlepis, distinguished by its collection locality and local coloration; aquarists keep and breed it as a discrete, provenance-labelled line.

Colour reference: living Kipili fish at tanganyika.si

About the species

Perissodus microlepis is a small cichlid from Lake Tanganyika that earns a living the way almost nothing else in fresh water does: it sneaks up behind larger fish and tears scales off their living flanks. Stranger still, the population comes in left- and right-mouthed forms, each twisted to bite one side of its prey — and a famous 1993 field study argued that whichever form is rarer enjoys a hunting advantage, keeping the two near a 50:50 split through frequency-dependent selection. That tidy 'textbook' story has since been complicated by work suggesting the asymmetry is more of a continuum than two clean morphs, which is part of what makes this unassuming fish one of the most argued-over animals in evolutionary biology.

Full Perissodus microlepis account →

Sources

  1. tanganyika.si — Perissodus microlepis "Kipili"
  2. Eschmeyer's Catalog of Fishes — Perissodus microlepis (species record, Boulenger 1898; holotype, synonymy)
  3. FishBase — Perissodus microlepis (size, ecology, trophic level, distribution, etymology)
  4. GBIF — Perissodus microlepis Boulenger, 1898 (taxonomy & occurrences)
  5. Hori, M. (1993), 'Frequency-Dependent Natural Selection in the Handedness of Scale-Eating Cichlid Fish', Science 260:216-219
  6. Hori (1993) abstract & metadata — PubMed