Original description as Haplochromis gracilis:
ZooBank:1543A0F0-87B9-4B9F-8153-20DEB62F48CD.
- Trewavas, Ethelwynn. 1935. "A Synopsis of the Cichlid Fishes of Lake Nyasa". Annals and Magazine of Natural History. Series 10:65-118 (crc00118)
Conservation: Mylochromis gracilis is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (LC) least concern (2006).