Lapidifer Cichlid

Retroculus lapidifer is one of the most evolutionarily primitive cichlids available to aquarists, representing a lineage that diverged early from the main cichlid radiation. Native to the clear, fast-flowing rocky stretches of the Araguaia and Tocantins rivers, it constructs and defends stone nests on the riverbed — a behaviour unique among cichlids. Its dark, attractively barred body and robust build reflect its rheophilic lifestyle.

This species requires high oxygen levels, strong water flow, and very clean conditions to replicate its clear-water rocky river habitat. Soft to moderately hard water is tolerated, but water quality must be impeccable. Coarse sand or fine gravel substrate with smooth rocks is appropriate. It is not a sand-sifter in the traditional eartheater sense but is undeniably related to the eartheater lineage.

Retroculus lapidifer is rarely bred in captivity, but the few documented breeding events confirm open substrate spawning on rock surfaces with biparental care. It is a species for dedicated enthusiasts who appreciate primitive cichlid biology and can provide the specific flow and oxygen conditions it requires.

Water: 26-30°C, pH 6.0-7.2, soft to moderately hard (2-12 dGH); high dissolved oxygen and strong flow essential. Tank: Minimum 300L; smooth river rocks, coarse sand or fine gravel; powerful circulation and surface agitation. Feeding: Sinking pellets, frozen bloodworm, crustaceans, live invertebrates; substrate-searching forager. Breeding: Open substrate spawner on rock surfaces; biparental care; very rarely achieved in captivity. Compatibility: Semi-aggressive; keep with other rheophilic species; avoid sluggish or delicate tankmates.