Forms shoals and frequents sandy or gravelly bottoms on lake shore; feeds on algae, plankton and small underwater insects .
Dorsal spines (total): 0; Dorsal soft rays (total): 19; Anal spines: 0; Anal soft rays: 27. It is distinguished from its congeners in the short dorsal fin originating above the first ray of the anal . Preanal length 64.1% of standard length; snout very short, the distance from the tip of the snout to the centre of the eye is 25.8% of head length . Width of mouth about 25% of head length . Teeth biscuspid, 10 in upper jaw and 22 in lower jaw .: fusiform / normal.
Behavioural data for Petrocephalus Degeni is currently being reviewed.
Freshwater; demersal. Tropical
algae, plankton and small underwater insects (Ref
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