Inhabits small river with transparent waters, very channeled and relatively deep (> 2 m deep in some points), having both rapids and waterfalls . Feeds on vegetal matter and insects .
Dorsal soft rays (total): 10; Anal soft rays: 18 - 20; Vertebrae: 38 - 39. Differs from all congeners and from all remaining characid fishes by having two symmetric, large dark blotches basally on caudal fin lobes .
Behavioural data for Knodus Geryi is currently being reviewed.
Diet information for Knodus Geryi is currently being compiled.
Reproduction data for Knodus Geryi is currently being compiled.
Freshwater; benthopelagic. Tropical South America: rio do Peixe in the upper rio Paraguay basin, Brazil.
vegetal matter and insects (Ref
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .
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