Erstbeschreibung als Pseudotropheus callainos:
ZooBank:77DCD02A-9798-477C-8FA8-05888D672FEF.
- Stauffer, Jay Richard Jr. & E. Hert. 1992. "Pseudotropheus callainos, a new species of mbuna (Cichlidae), with analyses of changes associated with two intra-lacustrine transplantations in Lake Malawi, Africa". Ichthyological Explorations of Freshwaters. 3(3):253-264 (crc01065) (Kurzfassung)
Artenschutz: Metriaclima callainos wurde durch die Internationale Union für die Erhaltung der Natur (IUZN) in der Roten Liste bedrohter Arten bewertet als (VU) potentiell gefährdet (2006). Although the Cobalt Zebra has been collected for the ornamental fish trade since the early beginning of the Malawi cichlid hobby, sometimes at a rate of more than 20,000 zebra per year, there is no visible threat to its existence. None of the geographical variants seems to be at risk.