The Electric Yellow Lab is one of the most popular and widely kept African Cichlids from Lake Malawi. Classified as an Mbuna (rock-dwelling cichlid), they are famous for their vibrant yellow coloration and striking black dorsal stripes. While considered one of the most 'peaceful' Mbuna, they are still highly territorial cichlids that require hard, alkaline water, a sandy substrate for digging, and abundant rockwork to establish territories.
At a Glance
Tank Requirements
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Water Parameters
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Temperament & Compatibility
Available Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Unsexed / Juvenile
Typically sold as unsexed juveniles (since males and females look nearly identical when young). As they mature, a heavily rocked tank is required to disperse developing aggression and establish territories.
Same care requirements as the base species
Also known as: Standard, Juvenile
Male
Males often develop slightly deeper yellow colors, darker/thicker black fin bands, and are highly territorial. In a mixed-sex tank, they must be kept in a harem ratio (1 male to 3+ females) to prevent them from harassing females to death.
Differs in 2 traits from base species
Also known as: Dominant Male, Breeder Male
Female
Females look very similar to males but are generally slightly smaller with occasionally lighter black markings. They are less aggressive than males and serve to disperse male aggression in a harem setup.
Differs in 2 traits from base species
Also known as: Female Mbuna
Yellow Lab (Mbuna) Care Guide Summary
The Yellow Lab (Mbuna), scientifically known as Labidochromis caeruleus, belongs to the Cichlids - African family group. Adults reach a maximum size of approximately 10 cm and have a fusiform body shape with a moderate growth rate. Classified as semi-aggressive, this species primarily occupies the mid-level and bottom zones of the aquarium and produces a high level of biological waste.
To thrive, the Yellow Lab (Mbuna) requires a freshwater only aquarium with a minimum volume of 150 litres and a tank length of at least 90 cm. Water temperature should be maintained between 24°C and 28°C, with a pH range of 7.5–8.8 and a general hardness of 10–25 dGH. A moderate water flow is preferred. An aquarium test kit can help you monitor these values.
The Yellow Lab (Mbuna) is a rewarding species to keep, provided its core environmental needs are met. This species is available in 3 varieties: Unsexed / Juvenile, Male, and Female. Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Yellow Lab (Mbuna) Habitat Setup
When setting up an aquarium for the Yellow Lab (Mbuna), a moderate water flow best suits their natural preferences. Because this species occupies the mid-level and bottom zones, the aquarium layout should prioritise open swimming space in the centre of the tank for free movement and sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include a sand substrate to accommodate their sifting behaviour and smooth gravel or rounded substrate to protect their sensitive barbels. Keepers should note that expect substrate disturbance, so lightweight décor should be secured and live planted layouts may be difficult to maintain, as this species tends to uproot or consume vegetation. Browse aquarium sand substrate options to find the best fit.
Yellow Lab (Mbuna) Compatibility Notes
Classified as semi-aggressive, the Yellow Lab (Mbuna) is adaptable and can be kept singly or in a small group, offering flexibility when planning a community tank. When choosing tankmates, conspecific aggression can be intense, especially in smaller tanks, territorial behaviour may cause issues if hiding spots or floor space are limited, and their energetic swimming style may stress more sedentary or timid species. Selecting tankmates that favour different water layers from the mid-level and bottom zones can help reduce competition and territorial overlap.
Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Yellow Lab (Mbuna).
40 Gallon Breeder
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
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Frequently Asked Questions About Yellow Lab (Mbuna)
How big does Yellow Lab (Mbuna) get?
Yellow Lab (Mbuna) (Labidochromis caeruleus) typically reaches a maximum adult size of approximately 10 cm. They have a fusiform body shape and a moderate growth rate.
What tank size does Yellow Lab (Mbuna) need?
A minimum aquarium volume of 150 litres and a tank length of at least 90 cm are recommended for Yellow Lab (Mbuna). This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Yellow Lab (Mbuna) need?
Yellow Lab (Mbuna) thrives in freshwater only conditions with a temperature range of 24–28°C, a pH between 7.5 and 8.8, and a general hardness of 10–25 dGH. A moderate water flow is preferred.
Is Yellow Lab (Mbuna) peaceful or aggressive?
Yellow Lab (Mbuna) is classified as semi-aggressive with an aggression score of 6 out of 10. They can work in community setups but may clash with certain tankmates.
Can Yellow Lab (Mbuna) live alone?
Yes, Yellow Lab (Mbuna) can be kept singly or in a group. They are flexible and adapt well to both setups.
Does Yellow Lab (Mbuna) have any special tank requirements?
Yes. Yellow Lab (Mbuna) benefits from sand (sifters) and smooth gravel (sensitive barbels) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Similar Species
Auratus Cichlid (Mbuna)
Melanochromis auratus
The Auratus Cichlid is a stunning but notoriously aggressive Mbuna from Lake Malawi. They exhibit extreme sexual dimorphism. They are strictly rock-dwellers that graze on algae (aufwuchs). Due to their hyper-aggressive nature, they must be kept in species-only or carefully managed, overstocked Mbuna setups with a strict harem ratio (1 male to several females) to disperse aggression.
Demasoni Cichlid (Mbuna)
Chindongo demasoni
A stunning but notoriously aggressive dwarf Mbuna from Lake Malawi. Known for its intense dark blue and black vertical stripes. They are strict herbivores (Aufwuchs grazers) and prone to 'Malawi Bloat' if fed high-protein diets. Due to extreme aggression toward their own kind, they require specific stocking densities.
Peacock Cichlid (Aulonocara)
Aulonocara sp.
Endemic to Lake Malawi, Peacock Cichlids are highly sought after for the breathtaking colors of the males. They are benthivorous, using sensory pores on their jaws to hunt small invertebrates in the sand. While territorial, they are generally peaceful compared to their aggressive Mbuna cousins. They require hard, alkaline water and a sandy substrate to prevent gill damage while sifting.
African Jewel Cichlid
Hemichromis bimaculatus
A strikingly beautiful but notoriously aggressive West African riverine cichlid. Unlike the alkaline-loving Rift Lake cichlids (e.g., Mbuna), Jewel Cichlids prefer neutral, softer water parameters. They are renowned for their brilliant red breeding dress and iridescent blue spots, but also for their extreme territoriality, especially when forming pairs and spawning. They are avid diggers and will uproot most plants.
Duboisi Cichlid (Tropheus)
Tropheus duboisi
An iconic Lake Tanganyika cichlid famous for its dramatic life-stage color change. Juveniles are jet black with brilliant white polka-dots, while adults develop a blue head and a distinctive yellow or white vertical band across a dark body. They are highly aggressive toward their own kind and must be kept in large colonies (10+) to disperse aggression. They are strict herbivores that require a specialized diet to avoid fatal digestive issues.
Fairy Cichlid (Brichardi)
Neolamprologus brichardi
An elegant but fiercely territorial Lake Tanganyika cichlid. They are famous for their complex social structure, forming massive, multi-generational colonies where older siblings help defend and raise new fry. Due to their extreme territoriality when breeding, they are best kept in a species-only tank, as they will aggressively eliminate non-colony tank mates.