This species inhabits a turbid pool, 25-30 m in diameter and about 1.5 m deep, with margins overgrown by grass .
Dorsal soft rays (total): 15 - 17; Anal soft rays: 16 - 19. This species is distinguished from its congeners by the following set of characters: body with irregular red-brown patches and stripes, forming a marble-like mottled pattern in male; anal and caudal fins with slender yellow to amber subdistal band and broad dark brown distal band; head depth 80-84% HL; caudal peduncle length 152-159 in % of its depth; head length 25.5-30.9% SL; caudal peduncle length 152-159 in % of its depth; prepelvic length 45.5-46.7% SL; and head width 65.5-72.9 in % of its depth .: fusiform / normal; Cross section: oval.
Behavioural data for Nothobranchius Marmoreus is currently being reviewed.
Freshwater; benthopelagic. Tropical
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