Gephyrochromis moorii

Gephyrochromis moorii is a moderately sized mbuna from Lake Malawi occupying rocky shoreline habitats. Males display blue-grey to steel-blue colouration with subtle dark barring; females are cryptically brownish. The species is not as frequently encountered in the hobby as more colourful mbuna, making it a valued find for collectors seeking less mainstream species.

Unlike many mbuna, G. moorii exhibits somewhat less extreme territorial aggression, making it a better candidate for mixed mbuna setups where overly aggressive species may not be desired. It grazes algae from rocks and requires a predominantly algae-based diet. As a maternal mouthbrooder, females hold eggs and fry for approximately 21–28 days. Management in harem groups with ample rockwork gives the best results. Hard, alkaline water matching Lake Malawi chemistry is essential for this species' health and longevity.

Water: 24–28°C, pH 7.8–8.5, hard (GH 10–25, KH 6–15); Rift Lake salt supplementation for soft tap water. Tank: 200 L minimum; rockwork for territories; somewhat more flexible than the most aggressive mbuna genera. Feeding: Algae-based diet — spirulina flake and pellets; supplement sparingly with frozen Mysis; avoid high-protein foods. Breeding: Maternal mouthbrooder; female holds 21–28 days; isolate brooding female for fry protection. Compatibility: Suitable with moderate mbuna; one of the better mbuna for mixed setups due to lower aggression level.