Maingano Cichlid
Pseudotropheus cyaneorhabdos
The Maingano Cichlid (Melanochromis cyaneorhabdos) is an enchanting and very elegant Mbuna famous for its hydrodynamic "torpedo" silhouette (typical of Melanochromis) and for its extraordinarily homogeneous livery: both males and females sport a dark blue or inky black background color, crossed horizontally by sharp luminescent electric blue (neon blue) stripes. This lack of evident chromatic sexual dimorphism distinguishes it from its close cousin M. johannii (where the females are yellow/orange). Behind this hypnotic and tapered beauty, however, lies a ruthless territorial killer: it is one of the most aggressive, intolerant and bellicose Mbuna of the lake, capable of literally exterminating any male of its own species or fish with similar striped patterns if not kept in huge rocky tanks.
Water Temperature
24 - 28 °C
pH Value
7.8 - 8.6
Water type
Freshwater
Tank level
Bottom and middle
Adult size
10 cm
Minimum tank volume
>= 200 L
Minimum group
>= 4
GH
10 - 25 dGH
KH
5 - 12 dKH
TDS
200 - 495 ppm
Conductivity
313 - 773 uS/cm
Species description
Geographical Origin and Habitat: Endemic to Lake Malawi in East Africa (specifically localized around Likoma Island). It is an "Mbuna" strictly confined to steeply sloping, rocky coastlines and sheer underwater cliffs devoid of sandy sediments, dwelling entirely within deep, dark rocky crevices.
Taxonomy and Morphology: Universally known in the hobby as the "Maingano". Belongs to the notorious Melanochromis genus, characterized by incredibly elongated, slender, torpedo-like bodies designed for rocketing through tight rocky labyrinths at blistering speeds. Reaches a maximum length of about 10 cm (4 inches).
Social Behavior: Highly dynamic, lightning-fast, and hyper-aggressive. It is considered one of the "bad boys" of the Malawi cichlid world, though slightly less psychotic and murderous than its infamous cousin, the Auratus (Melanochromis auratus). An incredibly tough fighter, it stubbornly claims a network of caves and relentlessly attacks trespassers with rapid-fire chases and lethal bites.
Coloration and Sexual Dimorphism: A spectacular display of horizontal striping. The entire body is slashed by alternating, thick horizontal bands of dark blue (almost black) and a blazing "Electric Neon Blue". **Extreme Lack of Dimorphism:** Unlike most Melanochromis (where males and females are opposite colors), Maingano BOTH males AND females share the exact same beautiful blue/black striped livery. Only an expert eye can tell them apart: dominant males have an intensely dark belly and brighter yellow "egg-spots" on the anal fin.
Care, breeding and tankmates
Aquarium Setup: Demands an extreme "Mbuna-style" setup. Minimum tank size is 120 cm / 4 feet (250+ liters / 65+ Gallons). It is absolutely imperative to build a massive, labyrinthine wall of rocks stacked almost to the water's surface, creating countless escape routes, dark caves, and visual barriers. Without dense rockwork to break lines of sight, the dominant male will systematically murder every tankmate in open water.
Diet and Feeding: Omnivore / "Aufwuchs" grazer. Requires a high-fiber, plant-based diet. Feed strictly with premium sinking Mbuna pellets rich in Spirulina and Kelp. While it can tolerate small amounts of animal protein (like occasional frozen mysis or krill), a diet based on heavy meaty carnivore foods will rapidly cause lethal intestinal bloating.
Water Quality: Strict African Rift Lake chemistry is required: hard and alkaline. pH must be locked between 7.8 and 8.6, with a high GH of 10-25. Temperature: 24-27°C (75-81°F). The controlled overstocking required to disperse Mbuna aggression demands titanic biological filtration and massive, weekly water changes to keep the water pristine and oxygen-rich.
Compatibility and Cohabitation: Social management is a minefield. A Harem system is required (1 male to a strict minimum of 3-5 females); keeping a single female with a male is a death sentence for her. Compatible only with equally robust Mbuna (Metriaclima, Labeotropheus) that DO NOT have horizontal stripes and are NOT blue/black. Mixing them with similarly patterned fish (like Pseudotropheus johannii) will trigger mistaken-identity bloodbaths.
Aquarium Breeding: Highly active Maternal Mouthbrooders. Spawning occurs deep within a dark cave. The male shivers violently to seduce the female. She lays up to 30 eggs, scoops them into her mouth, and inhales the male's sperm to fertilize them in her buccal cavity. Because the tank is a warzone, the brooding female (who fasts for 3 weeks) must have access to tiny, inaccessible crevices to survive the incubation without spitting her eggs from stress.
Risks and Diseases: 1. Stress-Induced Murder: the #1 cause of death is the dominant male butchering subdominant males or his own females due to a lack of hiding spots. 2. Identification Catastrophe: because males and females look identical, hobbyists often unknowingly buy multiple males at the store, leading to a guaranteed massacre. 3. Malawi Bloat from improper diet.
Geographic Origin and Distribution
Endemic to Lake Malawi in East Africa (specifically localized around Likoma Island). It is an "Mbuna" strictly confined to steeply sloping, rocky coastlines and sheer underwater cliffs devoid of sandy sediments, dwelling entirely within deep, dark rocky crevices.
Origin
Selective breeding and cultivarsAfrica and Madagascar
Fish profile
- Temperament
- Territorial
- The temperament is extremely aggressive. Dominant males fiercely defend their structures. Careful planning of tank mates is required.
- Diet
- Herbivore
- They are primarily herbivorous grazers. Feed them high-quality vegetable-based flakes. Avoid excessive protein to prevent digestive issues.
- Life expectancy
- 5-10 years
- The Maingano Cichlid has a lifespan of 5 to 10 years in captivity under proper aquarium management. Providing a clean environment with stable, alkaline water parameters is essential to ensure their health and longevity. A high-quality, plant-based diet helps maintain their immune system and prevents nutritional issues like bloating. Reducing stress by creating a well-structured aquascape with numerous caves also plays a significant role in extending their lifespan.
- Adult size
- 10 cm
- The catalog's scalar value is 10 cm. The FishBase SPECIES table (v25.04 snapshot) source reports a maximum adult measurement of 7.52 cm for this species, recorded as standard length (SL). The taxonomic record consulted is Pseudotropheus cyaneorhabdos (v25.04); male or unsexed record. These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
- Sex ratio
- Harem
- Keep one male with several females. This disperses the male's intense aggression. Multiple males require very large tanks.
- Feeding frequency
- Twice daily
- Feed small amounts twice daily. Overfeeding rapidly degrades water quality. Frequent small meals mimic natural grazing.
- Bioload
- Medium to High
- This species produces a high bioload. Regular water changes are crucial. A strong filtration system prevents waste buildup.
- Flow
- Strong
- They prefer moderate water flow. This ensures adequate oxygenation in the tank. Stronger surface currents facilitate gas exchange.
- Jump risk
- No
- Reproduction
- Oviparous
- They are maternal mouthbrooders. Females hold eggs for about three weeks. Fry are released fully formed.
- Compatibility & tankmates
- With caution
- It is a highly aggressive cichlid. Keep only with other assertive Mbuna. It will harass peaceful community fish.
- Tank level
- Middle/Bottom
- They dwell in the lower and middle levels. They actively defend rocky territories. Open swimming is mostly during feeding.
Scientific Parameters & Models
FishBase
Window to the official scientific data of the species
Data synced on: 06/15/2026
- Trophic level
- 3.5 ± 0.41 se
- Resilience
- High (less than 15 months)
- Phylogenetic uniqueness (PD50)
- 0.5
- Bayesian Length-Weight
- a = 0.01445, b = 2.99
- VulnerabilityLow vulnerability (10 / 100)
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
Related species
Recommendations grouped by close relatives, companion choices, and similar care.
