Ctenopoma Nanum

Ctenopoma nanum is the smallest commonly available member of the genus, reaching only about 8 cm, and also one of the most forgiving in terms of care and tankmate selection compared to its larger, more predatory relatives. Its colouration is a subtle mix of brown and buff with faint darker mottling, which provides concealment among vegetation but is less dramatically spotted than C. acutirostre.

This species adapts to a wider range of tank setups than larger Ctenopoma, though it still benefits from a planted Congo-style aquarium with caves and dim lighting. As a labyrinth fish, warm humid air at the surface is important. It can be kept in pairs or small groups in sufficiently spacious tanks, though males may spar.

Ctenopoma nanum accepts frozen meaty foods including bloodworm, brine shrimp, and micro-worm, as well as small floating pellets with time. Its smaller size means it can be housed with more medium-sized community species without the predation risk posed by larger relatives.

Water: Soft to moderately hard, pH 6.0–7.5, temperature 23–27°C, GH 2–12, KH 1–6. Tank: Minimum 100 L, planted with caves and hiding spots, surface air access. Feeding: Carnivore; frozen bloodworm, brine shrimp, micro-worm, and small floating carnivore pellets. Breeding: Bubble nest builder; soft acidic water; male guards nest; separate female after eggs laid. Compatibility: Semi-aggressive; peaceful with medium peaceful species; may eat very small fish.