Procatopus aberrans Ahl, 1927
Bluegreen lampeye
photo by Schmaus, G.

Family:  Procatopodidae (African lampeyes), subfamily: Procatopodinae
Max. size:  5.5 cm TL (male/unsexed)
Environment:  benthopelagic; freshwater; pH range: 6.5 - 7.19999980926514, non-migratory
Distribution:  Africa: Cross River in southwestern Cameroon (Ref. 31267, 57259) and smaller coastal flowing rivers, Niger and Benue Rivers in south-central and southern Nigeria (Ref. 7372, 57259).
Diagnosis:  Dorsal spines (total): 0-0; Dorsal soft rays (total): 8-10; Anal spines: 0-0; Anal soft rays: 15-17. Diagnosis: Larger-sized ‘Lampeye’ species; males usually with an extension at the upper corner of the caudal fin; sometimes with extended rays in the unpaired fins; ventral fins inserted distinctly behind pectorals; dorsal fin with 8-10 rays; anal fin with 15-17 rays; scales on mid-lateral series 27-33 (Ref. 57259). Colouration: Male colouration: variable in colouration; basic colour light grey to light olive, dorsal area darker, ventral area light to almost white; on the sides strong light blue-green to light blue reflections, not arranged in bands, but covering the entire sides; the unpaired fins may vary from colourless, through pale blue to orange or pink, sometimes provided with red spots; the margins at the unpaired fins are usually red or pink, but sometimes black; a white outer margin may be present in the lower caudal fin; the caudal fin extensions are usually white (Ref. 57259). Female colouration: pale, semi-transparent grey or olive; some pale silvery reflections may be present on the sides; the fins are all colourless (Ref. 57259). Both sexes show an orange reflective spot in the upper part of the eye iris (Ref. 57259).
Biology:  Found in small rivers and brooks under forest cover and in the forested savannah on soils of basal origin; usually swimming in schools in the streaming parts of the creeks (Ref. 57259). Not a seasonal killifish. Is very difficult to maintain in aquarium (Ref. 27139).
IUCN Red List Status: Least Concern (LC); Date assessed: 12 September 2019 Ref. (130435)
Threat to humans:  harmless


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