The type-locality (rio Juininha), is a clearwater river with sandy banks while at the rio Papagaio basin, the rio Buriti, is a mid-sized clearwater river (approximately 6–8 meters wide, > 2.0 meters deep at the deepest portions) with strong current in its channel, near its mouth with the rio Papagaio. The species was exclusively collected at this site along a small, shallow sandy shore .
This species is distinguished by the following characters: with a distinct broad vertical bar on head, at the level of the eye (mask) and an overall light background color, without large blotches or stripes on body or fins; with two to four blotches along the midline, and a broad vertical bar on head narrower at the level of the eye and extending over the entire opercle; posterior margin of pectoral-fin spine with serrations directed towards the tip of the spine .: fusiform / normal; Cross section: angular.
Behavioural data for Hoplisoma Rikbaktsa is currently being reviewed.
Diet information for Hoplisoma Rikbaktsa is currently being compiled.
Reproduction data for Hoplisoma Rikbaktsa is currently being compiled.
Freshwater; demersal; depth range 0 - 2 m . Tropical South America: Brazil.
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