Individuals of this species were found in groups; during the day they were commonly encountered below undercut river banks, especially in dense networks of tree roots or reed beds along the stream margins; places with shallow water and slow-flowing reaches of rivers and streams are especially attractive to them . Large numbers of small juveniles were found in bushes of aquatic reeds and floating grass on the periphery of the river or in side channels .
Dorsal spines (total): 0; Dorsal soft rays (total): 22 - 25; Anal spines: 0; Anal soft rays: 28 - 31; Vertebrae: 44. Diagnosis: Marcusenius krameri can be distinguished from its congeners by following characters: middle body depth 21.9-28.1% of standard length; distance from dorsal fin origin to end of caudal peduncle 39.9-41.7% of standard length; distance from anal fin origin to end of caudal peduncle 42.8-44.9% of standard length; dorsal fin length 15.5-20.0% of standard length; anal fin length 23.2-25.5% of standard length; depth of caudal peduncle 26.0-40.6% of its length; scales around caudal peduncle 16; total vertebrae 44; anterior gill rakers (5-6)+(5); total anterior gill rakers 10-11; posterior gill rakers (8)+(9); total posterior gill rakers 17; dorsal fin rays 22-25; anal fin rays 28-31; scales along lateral line 69-72; conical teeth on upper/lower jaws 4-6 . : elongated; Cross section: compressed.
Behavioural data for Marcusenius Krameri is currently being reviewed.
Freshwater; benthopelagic. Tropical; 17°C - 27°C ; 24°S - 25°S South Africa (Ref.
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