A striking Lake Malawi cichlid with a remarkable ability to change color in seconds. Requires a spacious rocky tank and experienced aquarist care.
Overview
The Bumblebee Cichlid (Pseudotropheus crabro) is one of the most recognizable cichlids from Lake Malawi, belonging to the family Cichlidae. It earned its common name from the distinctive yellow-and-black striped pattern resembling a bumblebee. However, the most remarkable feature of this species is its ability to change color rapidly: within seconds, the fish can shift from bright yellow with dark bars to an almost entirely dark coloration. This behavior is linked to emotional state, hierarchical position, and hunting strategy.
In the wild, Pseudotropheus crabro inhabits rocky biotopes of Lake Malawi, where it leads a symbiotic lifestyle with the large catfish Bagrus meridionalis. The cichlid cleans parasites from the catfish, and during spawning seasons may feed on its eggs — a behavior unique among Malawi cichlids. Adults reach a size of 10-15 cm, making them fairly large aquarium inhabitants.
This is a fish with a pronounced personality: dominant males actively patrol their territory and display impressive coloration during courtship rituals. Keeping Pseudotropheus crabro requires a certain level of experience, making this cichlid more suitable for aquarists already familiar with Malawi mbuna.
Tank Requirements
Bumblebee Cichlids require an aquarium of at least 200 liters. Given the territorial nature of these fish, the more space available, the fewer conflicts will arise among tank inhabitants. Optimal water parameters are: temperature 24-28°C, pH 7.5-8.5, and GH 10-20. These parameters are typical for Malawi cichlids, allowing you to keep crabro alongside other mbuna representatives.
The aquarium setup should replicate the rocky biotope of Lake Malawi. Use large rocks and rock piles to create numerous caves, crevices, and hiding spots. Each male should have the opportunity to claim a territory with shelter — this significantly reduces aggression levels. A sandy substrate is preferable, as these fish enjoy sifting through it.
Filtration must be powerful — cichlids produce considerable waste, and the water needs to remain clean and well-oxygenated. I recommend using an external canister filter with a turnover rate of at least 5-6 tank volumes per hour. Live plants generally do not survive with mbuna, so it is best to go without them or use hardy species like Anubias.
Feeding and Diet
Pseudotropheus crabro is an omnivorous species with a predominantly herbivorous diet. In the wild, these fish feed on algae growth, small invertebrates, and parasites from catfish bodies. In the aquarium, the diet should be based on high-quality cichlid foods containing spirulina and plant-based ingredients.
The recommended feeding schedule is 2-3 times daily in small portions. The core menu should consist of pellets or flakes designed for Malawi cichlids, blanched vegetables (zucchini, cucumber, spinach). Protein supplements (brine shrimp, daphnia, bloodworms) should be offered no more than 1-2 times per week in limited quantities. Excess protein in mbuna diets frequently leads to Malawi bloat, which can be fatal.
In my experience, spirulina flakes combined with occasional frozen brine shrimp supplementation yield excellent results: the fish display vibrant coloration and robust health.
Care and Maintenance
Stability of water parameters is the key factor in successfully keeping Pseudotropheus crabro. Weekly water changes of 25-30% are mandatory. With higher stocking densities, increase changes to 30-40%. Regularly test ammonia, nitrite, and nitrate levels — nitrates should not exceed 20-30 mg/l.
Maintain temperature within the stable range of 24-28°C, avoiding sudden fluctuations. The filter should be rinsed every 2-3 weeks in tank water to preserve the colony of beneficial bacteria. Vacuum the substrate during every water change, paying special attention to areas between rocks where food debris accumulates.
Monitor fish behavior closely. A dominant male may display excessive aggression toward subordinate individuals — in such cases, rearranging the decorations to reset territorial boundaries may be necessary. This is a simple but effective technique I regularly use when keeping mbuna.
Compatibility
The Bumblebee Cichlid has a fairly high level of aggression and territoriality, so choosing tank mates requires careful consideration. The best companions are other Malawi mbuna of comparable size and temperament: Pseudotropheus zebra, Labidochromis caeruleus, Melanochromis auratus, Maylandia callainos, or Metriaclima lombardoi.
Keeping multiple male Pseudotropheus crabro in one tank is only feasible with sufficient volume (400 liters or more) and abundant hiding places. The optimal ratio is one male to 2-3 females, which distributes aggression and reduces stress on females.
It is strongly discouraged to keep crabro with peaceful cichlids, such as Aulonocara, which cannot withstand the assertive temperament of mbuna. Also avoid housing them with small fish — they will be constantly chased and stressed.
Breeding
Breeding Pseudotropheus crabro in aquarium conditions is quite achievable and not overly challenging for an aquarist experienced with Malawi cichlids. Like other mbuna, this species is a maternal mouthbrooder — the female incubates fertilized eggs in her buccal cavity for 18-21 days.
To stimulate spawning, maintain the temperature at the upper end of the range — around 26-28°C. The male selects a flat area on the substrate or a rock and attracts the female through characteristic dances and color displays. After the eggs are laid and fertilized, the female collects them into her mouth.
During incubation, the female barely eats, so it is important that she is well-nourished before spawning. After releasing the fry, the female should be separated for recovery. The fry are immediately capable of accepting newly hatched brine shrimp and finely crushed flake food.
To improve fry survival rates, I recommend moving the brooding female to a separate 20-30 liter tank with filtration and water parameters identical to the main aquarium. This protects both the female from stress and the fry from being eaten by other tank inhabitants.