Nannocharax ansorgii Boulenger 1911

Diagnosis: snout and anal fin short; head length 22.9-31.8% SL; scale formula 5-6/42-45/-; 13-16 scales around caudal peduncle; 1.5-3 scales between anus and anal-fin origin; development lateral line variable with geographical region; pectoral fins not reaching to pelvic-fin bases; dorsal-fin origin distinctly ahead of pelvic-fin insertions; 8-12 anal fin branched rays; 11-14 dorsal fin branched rays; 10-13 pectoral fin branched rays; 8-10 pelvic fin branched rays; back usually uniformly brown (sometimes with cross-bars); dark band covering mid-lateral series of scales, and extending unto central caudal-fin rays (Ref. 2936, 86396). Description: snout pointed; relatively short and compressed body; upper jaw with 10-14 bicuspid teeth; progressive decrease (from 16 to 13) in number of scales around caudal peduncle from west towards east; lateral line complete or almost complete in Gambia, Guinea Bissau and Sierra Leone (37-45 lateral line scales, 42-45 lateral stripe), but incomplete in Senegal, Niger-Bénoué, Chad, Bandama, Comoe, Volta and Pra (12-44 lateral line scales, 39-45 lateral stripe) (Ref. 2936, 86396).Coloration: brown lateral stripe from snout to caudal fin base; in juveniles band composed of series small, rounded spots; yellow body, uniformly brown back (sometimes with about ten cross-bars), pink fins; dorsal fin sometimes marked with 2 or 3 transverse stripes (Ref. 2936, 86396).

Potamodromous. Migrating within streams, migratory in rivers, e.g. Saliminus, Moxostoma, Labeo. Migrations should be cyclical and predictable and cover more than 100 km.

Maximum TL was recorded at 4.6 cm (Ref. 7094).

aquarium: commercial