Clarias macromystax Günther, 1864

Family:  Clariidae (Airbreathing catfishes)
Max. size:  31.6 cm TL (male/unsexed)
Environment:  demersal; freshwater, potamodromous
Distribution:  Africa: Ouémé, Ogun, Oshun, the Niger delta, Niger River up to Lake Kainji and the rivers Benue and Cross, in Benin and Nigeria (Ref. 57129). Also reported from the Ofin River (Pra basin) in Ghana (Ref. 248, 272).
Diagnosis:  Dorsal spines (total): 0-0; Dorsal soft rays (total): 74-87; Anal soft rays: 57-67; Vertebrae: 60-62. Diagnosis: tooth plates extremely narrow (Ref. 248, 57129). Vomerine tooth plate very long (Ref. 248), its length almost twice that of the premaxillary plate (Ref. 57129). Width of premaxillary plate 21.5-26.2% of head length, width of vomerine plate 19.0-22.8% of head length, length of vomerine plate 5.2-8.6% of head length (Ref. 57129). Head short and rounded in dorsal outline; eyes relatively large and dorsally located; frontal fontanelle very small, short and squat (`sole-shaped'); occipital fontanelle small and oval-shaped; "dermosphenotic" and supraorbital bones joined by a common suture, except in a specimen of 27 mm SL; pectoral spine robust and slightly curved; openings of secondary canals along lateral line appear as irregular white spots on body (Ref. 248). Coloration: no information on colour in life (Ref. 57129). Preserved specimens show 2 types of colouration: uniform, with back and sides dark brown and belly lighter; and marbled, with irregular brownish spots against a light background on back and sides, and belly whitish (Ref. 57129). Dorsal and anal fins white-edged (Ref. 57129).
Biology:  No information is available on the biology of the species (Ref. 78218).
IUCN Red List Status: Least Concern (LC); Date assessed: 29 April 2019 Ref. (130435)
Threat to humans:  harmless
Country info:   
 


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