Original description as Tilapia deckerti:
- Thys van den Audenaerde, Dirk F.E.. 1967. "Description of Tilapia deckerti sp. nov. from Lake Ejagham, West Cameroon (Pisces, Cichlidae).". Revue de Zoologie et Botanique Africaines. pp. 349-356 (crc00987)
Conservation: Coptodon deckerti is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (CR) critically endangered (2010). The species habitat is in risk from oil plantations and slash and burn agriculture leading to sedimentation and pollution in the lake. There is also a potential threat from the lake 'burping' CO2. C. deckerti is endemic to a very restricted habitat where potential changes in surrounding land use may critically damage Lake Ejagham environment.