Enantiopus melanogenys Breeding Guide

Breeding Enantiopus melanogenys, a sand-bower-building Tanganyikan cichlid. It is a lek breeder and maternal mouthbrooder kept in groups over open sand.

Overview

Enantiopus melanogenys (Boulenger, 1898) is a sand-dwelling cichlid endemic to Lake Tanganyika; FishBase treats Xenotilapia melanogenys as the valid name, so the two are the same species (synonyms include Ectodus melanogenys and Enantiopus longianalis). It reaches about 15 cm TL and forages in large schools over the sandy bottom. FishBase classifies it as a lek breeder and polygamous maternal mouthbrooder, and a peer-reviewed phylogenetic study of Xenotilapia parental care (PMC3275620) likewise lists Enantiopus melanogenys as a maternal mouthbrooder. This corrects the biparental label sometimes applied to it: incubation is by the female alone.

Sexing

Males are the brightly colored, display-active sex and develop their strongest coloration when defending spawning sites on the sand; females are duller. Sexing is most reliable by observing courtship and territorial behavior within the group.

Conditioning

The species is a benthic micro-predator that takes small invertebrates from the sand, so a varied diet of small meaty foods conditions the colony. FishBase gives a pH range of 7.5-8.5 and tropical temperatures around 25 °C.

Breeding Setup

A large open footprint with a deep, fine-sand bed is needed because males build sand structures and defend neighboring territories within a lek. The group is kept together over sand with minimal obstruction so males can construct and hold their bowers.

Spawning Behavior & Trigger

FishBase describes colonial lek spawning: males establish adjacent sand territories and court visiting females, which select among the displaying males. After fertilization the female takes the eggs into her mouth and incubates the brood herself in the maternal mouthbrooding pattern.

Egg & Fry Care

The female carries and protects the eggs and larvae in her mouth until the fry are released over the sand to forage. Exact brood durations and fry-rearing details for this species are not specified in the consulted scientific sources and are therefore omitted.

Common Challenges

These sand-dwellers demand pristine, oxygen-rich water and a genuine soft-sand bed; sharp substrate and unstable water harm them. The lek mating system also means a tank must be large enough to support multiple male territories without constant fighting.