Enantiopus melanogenys Care Guide
Enantiopus melanogenys is a sand-dwelling cichlid endemic to Lake Tanganyika. Males build large sand bowers to court females and the species is a maternal mouthbrooder.
Compiled by Aquairi from published sources · Published · Updated
Overview
Enantiopus melanogenys is a cichlid endemic to Lake Tanganyika in East Africa. It was described by Boulenger in 1898 and is now widely treated under the genus name Xenotilapia (as Xenotilapia melanogenys). The species lives over open sand, where foraging schools sift the substrate for small invertebrates. Males are noted for building broad sand pits, or bowers, used to attract females.
Taxonomy
- Family: Cichlidae
- Genus: Enantiopus
- Scientific name: Enantiopus melanogenys
- Common synonyms: Xenotilapia melanogenys, Ectodus melanogenys
Habitat
The species is endemic to and widespread in Lake Tanganyika, recorded between roughly 3 and 9 degrees south. According to FishBase it is a freshwater, demersal fish found over sandy substrates to depths of about 40 metres. Sandy bottoms are central to its life history, as the fish both feed and breed on open sand.
Tank requirements
- Minimum tank volume: 400 L for a colony with adequate open sand
- Temperature: 24-27 °C (75-81 °F)
- pH: 8.5-9.2
- GH: 12-25 °dGH
- Group size: keep in colonies of 6 or more
- Substrate: deep fine sand for bower building
- Lifespan: 6-10 years
A wide, open sand floor matters more than tank height, because dominant males excavate large bowers during courtship.
Diet
Enantiopus melanogenys is a carnivorous benthic feeder. FishBase records a natural diet of copepods, ostracods and shrimps taken from the sand. In aquaria a varied menu of small frozen and prepared foods that sink to the substrate suits its feeding style.
Compatibility
The species is comparatively peaceful, though males defend their bowers during breeding. It occupies the bottom of the water column and is best matched with other open-water or sand-tolerant Tanganyikan cichlids such as Cyprichromis or Cyphotilapia. Aggressive rock-dwellers like Mbuna or Tropheus are unsuitable companions.
Breeding
FishBase describes the species as a polygamous maternal mouthbrooder that breeds colonially. Males build and defend sand bowers within a lek; females that spawn carry the eggs and fry in the mouth.
Conservation status
IUCN Red List: Data Deficient. The species is collected for the aquarium trade.
Enantiopus melanogenys Breeding Guide
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.