Facultative air-breathing in the genus ; Found most frequently in cracks and interstitial spaces of granitic rocks in flowing water .
Dorsal spines (total): 2; Dorsal soft rays (total): 7. Distinguished from all other ancistrins by coloration, lacking a connection between the dorsal and adipose fins and having less than 30 teeth per jaw ramus .: elongated.
Behavioural data for Hemiancistrus Subviridis is currently being reviewed.
Diet information for Hemiancistrus Subviridis is currently being compiled.
Reproduction data for Hemiancistrus Subviridis is currently being compiled.
Freshwater; demersal. Tropical South America: rio Orinoco and rio Casiquiare drainages in Venezuela.
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