Lethrinops macrophthalmus

Lethrinops macrophthalmus is distinguished within the genus by its proportionally large eyes — an adaptation for life in the dimmer light of deeper sandy zones in Lake Malawi. Males in breeding color develop a clean metallic blue iridescence on the flanks with warm orange accents on the dorsal and anal fin edges, creating a delicate yet attractive color combination.

This species inhabits sandy slopes at moderate depths in the lake, foraging methodically by scooping mouthfuls of substrate and sifting out invertebrates and organic particles. Its large eyes make it somewhat more sensitive to bright lighting than shallower-water Lethrinops, so moderate aquarium lighting is preferred. The species is entirely peaceful and integrates well in sand-dominated Malawi biotope aquaria.

Maternal mouthbrooder producing moderate broods. Females are silver-grey and cryptic. A reliable breeder in well-maintained aquaria. An excellent choice for adding natural sand-sifting behavior to a mixed Lethrinops and Peacock display.

Water: pH 7.6–8.8, 24–28°C, GH 10–20, KH 10–18; stable alkaline water with moderate filtration and low-medium lighting. Tank: 250 L minimum; fine sand substrate 7+ cm deep; low-moderate lighting; open sandy floor for foraging. Feeding: Omnivore pellets, frozen mysis, live blackworm buried in sand; feed twice daily. Breeding: Easy maternal mouthbrooder; females hold ~3 weeks; separate brooding female for best fry survival. Compatibility: Peaceful; ideal with Aulonocara, Lethrinops, Tramitichromis; avoid large predatory Haps.