Bathyaethiops is a genus of small African tetras in the family Alestidae, restricted to the Congo basin — the atlas has records from Cameroon, the Republic of Congo, and the Democratic Republic of Congo. The 6 species in the atlas are diminutive schooling fish, from about 1–3 in, native to the forest streams and blackwater-influenced tributaries that thread through the Congo basin's rainforest, alongside many other small characiform tetras in the region.
The common names recorded in the atlas — African Moon Tetra (Bathyaethiops caudomaculatus), Red-back moon tetra (B. flammeus), Green Moonfish Tetra (B. greeni), and Baka Tetra (B. baka) — point to a genus known to specialist African-tetra keepers rather than the general aquarium trade, where it remains an uncommon import compared with better-known Congo basin relatives such as Phenacogrammus. Conservation data are still catching up with the genus: four of the six species in the atlas have not yet been formally assessed, and the two that have both carry Least Concern ratings.