Fossochromis rostratus

Fossochromis rostratus, the Rostratus Cichlid, is a specialist sand-sifter recognized by its elongated, distinctly downcurved rostrum — an adaptation for plowing through the sandy substrate of Lake Malawi in search of buried invertebrates and organic matter. Juvenile fish are silver-grey with faint markings, but dominant males transform brilliantly to an electric blue over the entire body, with the long snout becoming an equally vivid blue.

This is a large cichlid requiring substantial space. It is a constant digger and will rearrange sand substrate continuously; avoid planted sections in the same tank. The behavior is fascinating to observe — the fish methodically works over the sand in broad sweeping passes, often followed by smaller utaka opportunistically picking up disturbed invertebrates.

Fossochromis rostratus is a maternal mouthbrooder. Females hold for approximately 3–4 weeks. The species is generally peaceful for its size toward dissimilar fish but can be aggressive toward similarly colored males. Pair with other large, robust Haps for the best community.

Water: pH 7.6–8.8, 24–28°C, GH 10–20, KH 10–18; regular water changes important as sand-sifting can disturb detritus. Tank: 450 L minimum with deep fine-sand substrate of at least 7–10 cm depth; no live plants — this species will uproot everything. Feeding: Carnivore pellets and frozen krill; will forage naturally if live blackworm or brine shrimp are added directly to the sand surface. Breeding: Maternal mouthbrooder; females stop eating during 3–4 week hold; provide a separate nursery or breeding tank for best results. Compatibility: Combine with large Haps and Peacocks; avoid aggressive mbuna; excellent pairing with Copadichromis utaka.