Coptodon deckerti

{{Short description|Species of fish}}

{{Speciesbox

| image = Deckerts Tilapie (Wrocław Zoo).jpg

| status = CR

| status_system = IUCN3.1

| status_ref =

| taxon = Coptodon deckerti

| authority = (Thys van den Audenaerde, 1967)

| synonyms = Tilapia deckerti Thys van den Audenaerde, 1967

| synonyms_ref = {{FishBase|Coptodon|deckeri|month=December|year=2019}}

}}

Coptodon deckerti is a critically endangered species of fish in the cichlid family, endemic to Lake Ejagham in western Cameroon. It is threatened by pollution and sedimentation from human activities, and potentially also by emissions of carbon dioxide (CO₂) from the lake's bottom (compare Lake Nyos),{{Cite iucn | author = Moelants, T. | title = Tilapia deckerti | page = e.T21897A9337295 | year = 2010 | doi = 10.2305/IUCN.UK.2010-3.RLTS.T21897A9337295.en | access-date = 24 December 2017}} although Ejagham is too shallow to contain very high amounts of this gas.Freeth, S.J.; C.O. Ofoegbu; and K.M. Onuoha (1992). Natural Hazards in West and Central Africa, pp. 50—51. {{ISBN|978-3-663-05239-5}} A species of catfish from the genus Parauchenoglanis has recently been introduced to the lake, and this probably presents a serious threat to the endemic cichlids.Dunz, A. R., & Schliewen, U. K. (2010). Description of a Tilapia (Coptodon) species flock of Lake Ejagham (Cameroon), including a redescription of Tilapia deckerti Thys van den Audenaerde, 1967. Spixiana, 33(2): 251-280

It was formerly recognized as the only cichlid endemic to Lake Ejagham, but six others were described in 2010 and 2011 (which has resulted in some historical confusion over its size and ecology).Neumann, D., Stiassny, M. L. J, & Schliewen, U. K. (2011). Two new sympatric Sarotherodon species (Pisces: Cichlidae) endemic to Lake Ejagham, Cameroon, west-central Africa, with comments on the Sarotherodon galilaeus species complex. Zootaxa 2765: 1–20 It reaches up to about {{convert|10|cm|in|abbr=on|0}} in standard length and closely resembles the larger C. nigrans.

The specific name of the cichlid honours German zoologist Kurt Deckert (1907-1987), who was curator of fishes at the Museum für Naturkunde in Berlin, for his assistance to Thys van den Audenaerde when he visited the museum, and for spending many hours providing required and useful data for that authors research into the Cichlidae.{{cite web | url = http://www.etyfish.org/cichlidae2/ | author1 = Christopher Scharpf | author2 = Kenneth J. Lazara | name-list-style = amp | date = 2 October 2019 | title = Order CICHLIFORMES: Family CICHLIDAE: Subfamily PSEUDOCRENILABRINAE (a-g) | work = ETYFish Project Fish Name Etymology Database | accessdate = 18 February 2020 | publisher = Christopher Scharpf and Kenneth J. Lazara}}