Found in a small clear water stream, up to 10 m wide and 2 m deep, with a bottom formed of a mixture of sand and mud and larger boulders. Occurs mostly from among bundles of tree roots hanging into the water along the edges of the stream and from thicker layers of leaf litter that had accumulated in low current depressions of the stream .
Dorsal spines (total): 14 - 15; Dorsal soft rays (total): 8 - 9; Anal spines: 3; Anal soft rays: 8 - 9; Vertebrae: 28 - 29. Distinguished from all its congeners by having conspicuous black caudal blotch on the caudal peduncle (vs. absence), by having a horizontal suborbital stripe (vs. absence), by the anterior dorsal fin lappets in males not extending beyond fin spines (vs. extending considerably beyond spines), and by its vertebral count (14+14-15= 28-29 vs 11-13+12-14=24-27). Differs further from Dario dario and Dario hysginon by the absence in males of a dark stripe along the anterior margin of the pelvic fin, and from Dario dario by the absence of bars in males .: elongated.
Behavioural data for Dario Urops is currently being reviewed.
Diet information for Dario Urops is currently being compiled.
Reproduction data for Dario Urops is currently being compiled.
Freshwater; benthopelagic. Tropical
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