Diagnostic Description
provided by Fishbase
A conspicuous dark blotch present at the humeral region. Scales rows between dorsal-fin origin and anal-fin origin 7-8. Mature males with anal-fin gland cup-shaped, its lower part much more developed than the upper (Ref. 81197).Description: Dorsal-fin rays ii,8; anal-fin rays iv,17-19; pectoral-fin rays i,11-12; pelvic-fin rays i,7 (Ref. 81197).
Morphology
provided by Fishbase
Dorsal soft rays (total): 10; Analsoft rays: 21 - 23; Vertebrae: 36 - 38
Biology
provided by Fishbase
Occurs in clear water rocky rapids, with thick sand on the bottom. Forms small schools of about 10-15 individuals actively swimming against fast flowing waters below a one meter high fall (Ref. 81197).
