Maingano

Water parameters

Tolerated range for this species. Aim for the middle of each band rather than the extremes.

Tank and habitat

Substrate: sand.

Behavior

Plant interaction: destroys most plants.

Feeding

Omnivore with herbivorous emphasis, like all Mbuna. Spirulina-based flake or pellets as the staple, supplemented with blanched vegetables (peas, zucchini, spinach) and occasional frozen food (brine shrimp, mysis). Limit high-protein foods, especially bloodworm, which is associated with Malawi bloat in Mbuna. Feed 2-3 small meals daily rather than one large feeding to reduce aggression at feeding time. They're fast, competitive eaters that outcompete slower tankmates.

Compatibility

• Aggressive Mbuna cichlid, more assertive than many similarly sized species. Males are territorial and chase conspecifics and similar-looking fish relentlessly.
• Keep in groups with a ratio of one male to 3-4 females. All-male tanks are not recommended for this species; males fight each other intensely. In a mixed Mbuna tank, mainganos hold their own but shouldn't be paired with the most aggressive species (Melanochromis auratus, M. chipokae).
• The deep blue-purple body with lighter horizontal stripes makes them visually similar to several other Melanochromis species. Avoid keeping with M. cyaneorhabdos (also called maingano by some sources) or M. johanni, as they hybridize and fight.
• Standard Mbuna tank setup: overstocked moderately to spread aggression, abundant rock piles for territory boundaries and hiding spots, minimum 200 L for a group.

Origin and habitat

Endemic to Lake Malawi, where it is known only from a narrow stretch of rocky shoreline on the northeastern coast of Likoma Island, between Mbako Point and Membe Point, and around nearby Maingano Island. An extremely restricted range. Listed as Critically Endangered by IUCN, largely due to overcollection for the aquarium trade. Described by Bowers and Stauffer in 1997 as Melanochromis cyaneorhabdos; later reclassified as Pseudotropheus cyaneorhabdos. The common name comes from Maingano Island off the Likoma coast. Inhabits rocky substrates at depths of 5 to 10 meters. Often confused with P. johannii, but can be distinguished because both sexes of the maingano are similarly colored (dark blue with bright blue horizontal stripes), whereas female P. johannii are orange. Males may show more intense coloring, particularly when dominant. Grows to about 7.5 cm standard length. Males can be fierce toward conspecifics and will fight among themselves, sometimes fatally. Should not be kept with other horizontally striped species, as they may be intolerant of similar-looking fish and could hybridize with related species. Maternal mouthbrooder (LiveFishDirect).

Breeding

Maternal mouthbrooder, following the standard Mbuna pattern. The male displays on a territory (usually a flat rock or pit in the sand) and attracts females with lateral displays and quivering. Spawning follows the egg-dummy method: the female deposits a few eggs, picks them up in her mouth, then mouths the egg-spot markings on the male's anal fin, stimulating sperm release that she takes in to fertilize the eggs. The cycle repeats until 10-25 eggs are being carried. The female holds the brood for 18-21 days without eating. Fry are released fully formed at about 8–10 mm and eat crushed flake and baby brine shrimp. In a community Mbuna tank, some fry survive by hiding in rock crevices. For maximum yield, strip the female at 14-18 days or isolate her in a separate tank to release fry. Breeding is constant in healthy groups; a new brood appears every 4-6 weeks.

Common problems

Malawi bloat is the main health concern for all Mbuna, including mainganos. The symptoms (swollen abdomen, white stringy feces, loss of appetite, rapid breathing) progress to organ failure if untreated. Metronidazole is the standard treatment. Prevention: keep the diet herbivore-heavy, maintain water quality, and avoid chronic stress from inadequate stocking or bad male-to-female ratios. Hybridization with other Melanochromis species is a persistent issue in mixed tanks. The resulting offspring are genetic mixes that contaminate breeding lines and are difficult to sell. If keeping multiple Melanochromis species, accept hybridization or separate them. Aggression between males is more intense than in milder Mbuna like yellow labs; injuries (torn fins, lip damage from jaw-locking) are common in undersized tanks.

Bioload

Further reading

• Stocking ideas by tank size