Nicolsi Mouthbreeder (Pseudocrenilabrus nicolsi) — 5-6cm

Overview

The Nicolsi Mouthbreeder (Pseudocrenilabrus nicolsi) is a hardy, attractive African mouthbrooding cichlid native to the Congo Basin. Prized for its manageable size, fascinating breeding behaviour, and adaptability, this species rewards aquarists with vibrant coloration, active behaviour, and rewarding maternal mouthbrooding displays. With an adult size of around 4.5 cm, P. nicolsi is ideally suited to smaller African cichlid setups or carefully planned community aquariums.

Appearance

Pseudocrenilabrus nicolsi displays a compact, robust body with vivid coloration that varies depending on sex, mood, and breeding condition. Males typically exhibit brighter colours with iridescent blues, greens, and reds, especially during courtship, while females are more subdued with golden or olive tones. The body is laterally compressed, with well-proportioned fins and a strong jaw adapted for mouthbrooding. The overall appearance is both striking and functional.

Natural Habitat

This species inhabits slow-flowing rivers, pools, and swamps across the Congo Basin in Africa. The natural environment is characterised by soft to moderately hard water, warm temperatures, dense vegetation, and submerged wood or leaf litter. In the wild, Nicolsi Mouthbreeders forage among plants and debris, feeding on small invertebrates, insect larvae, and detritus, and males establish small territories to attract females for spawning.

Aquarium Setup

Recreate a Congo Basin biotope with moderate rockwork or driftwood, live plants (such as Anubias, Java fern), and open swimming areas. Use a sandy or fine gravel substrate and ensure stable water chemistry: pH 6.5–8.0, soft to moderately hard water (GH 5–15°), and a temperature of 22–28°C. A minimum of 40 litres is recommended for a small group, with larger tanks supporting additional tankmates. Provide gentle to moderate filtration, regular water changes, and subdued lighting to reduce stress.

Water Parameters

Nicolsi Mouthbreeders are adaptable but thrive best in stable, well-maintained conditions. Aim for 22–28°C, pH 6.5–8.0, and soft to moderately hard water. Conduct weekly partial water changes (20–30%) to maintain low nitrate levels and replenish essential minerals. Use a high-quality filter rated for the tank volume, and consider adding driftwood or Indian almond leaves to naturally acidify and tannin-stain the water. Monitor parameters closely, as fluctuations can stress these sensitive fish.

Feeding

In the wild, Pseudocrenilabrus nicolsi feeds on small invertebrates, insect larvae, and detritus. In captivity, offer a varied omnivorous diet: quality cichlid pellets or flakes supplemented with frozen and live foods such as brine shrimp, daphnia, bloodworms, and other small invertebrates. Include some plant matter or spirulina-based foods for digestive health. Feed small portions once or twice daily, and avoid overfeeding to prevent water quality issues. A balanced diet supports vibrant coloration, healthy growth, and successful breeding.

Behaviour

This species is semi-aggressive, with males becoming territorial especially when breeding. Males establish small territories and court females with impressive displays. Outside breeding periods, Nicolsi Mouthbreeders are relatively peaceful and can coexist with other small African fish in appropriately sized tanks. Watching females carry and release fry from their mouths is one of the most rewarding aspects of keeping this species.

Tank Mates

Suitable companions include other small, peaceful African fish of similar size, robust small catfish such as Synodontis spp. (only if tank size and temperament allow), or species-only or carefully planned African community setups. Avoid very small fish, long-finned fish, highly aggressive cichlids, overly timid species, or shrimp and small invertebrates. Careful planning and adequate space ensure a harmonious community.

Breeding

Pseudocrenilabrus nicolsi is a maternal mouthbrooder. Males establish territories and females incubate the eggs and fry in the mouth for about 3–4 weeks. Provide a quiet tank with caves or flat surfaces, and remove or protect the female if needed during the brooding period. Fry can be fed newly hatched brine shrimp or specialist fry foods once released. Stable water conditions and excellent filtration support successful breeding.

Why Buy from Tropical Fish Co

Tropical Fish Co is a leading UK specialist in African cichlids for sale UK, offering healthy, quarantined species including the fascinating Nicolsi Mouthbreeder. Every fish is carefully selected, acclimated to our expert holding systems, and dispatched with detailed care guidance. Whether you're building your first African cichlid setup or adding to an established community, our knowledgeable team is here to support your success. Order online today for fast, reliable delivery and discover why Tropical Fish Co is the trusted choice for premium freshwater fish for sale UK.