Nanochromis consortus

Nanochromis consortus is one of the rarer members of the genus, collected from the Congo River basin where it inhabits well-oxygenated, clear to lightly tannin-stained streams and river margins. It is a slender, subtly attractive species — males show a faint lateral stripe and a hint of blue-green iridescence; females have a slightly pinker belly tone when in condition.

Obligate cavity-spawning is the norm, with the female remaining deep inside the chosen cave for much of the breeding period while the male guards the territory outside. The pair bond is typically strong and the species can be long-lived in well-maintained aquaria. Water quality must be excellent — low nitrates and consistent soft, acidic chemistry.

N. consortus does best in a dedicated species tank or a very calm community with non-competitive, small upper-level fish. Soft, warm water (pH 5.5–6.8, low hardness) replicates the Congo forest stream environment where this species is most commonly found.

Water: 24–27°C, pH 5.5–6.8, soft (GH 1–8, KH 1–4); low nitrate (<15 ppm) essential for long-term health. Tank: 60 L minimum; terracotta or coconut-shell caves, sand substrate, and some cover planting. Feeding: Small live or frozen foods — daphnia, brine shrimp, cyclops; quality micro pellets accepted when settled. Breeding: Obligate cave-spawner; female incubates in cave, male guards outside; remove surplus fish during brooding. Compatibility: Species tank strongly preferred; only the most peaceful dither fish if community tank attempted.