Occurs in headstream waters, including cascade waterfalls, to lower reaches, including small streams approximately 1-2 m deep with low flow and sandy and gravel substrates .
Dorsal spines (total): 0; Dorsal soft rays (total): 7 - 9; Anal spines: 0; Anal soft rays: 19 - 21; Vertebrae: 29 - 30. This species, a member of the Oryzias woworae species group, is distinguished by the following: live males with a bluish sheen on the body; differs from other species of the Oryzias woworae species group by the following characters: transverse scales 8; head length 26.6%-27.7% of SL in males, 28.0%-28.9% SL in females; body depth at anal-fin origin 24.3%-28.2% SL in males, 23.5%-24.0% SL in females; rare or no pigmentation along the ventral and dorsal margins of caudal fin of males after preservation .: elongated; Cross section: oval.
Behavioural data for Moramo ricefish is currently being reviewed.
Freshwater; benthopelagic; depth range 1 - 2 m . Tropical
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