The Hemigrammus silimoni lives in the benthopelagic, freshwater environment.
Hemigrammus silimoni is distinguished from congeners in having a conspicuous ocellated caudal-fin blotch on the lower portion of the dorsal caudal-fin lobe, a character unique to this species. More
Hemigrammus silimoni is described from the Rio Juruena, upper Rio Tapajós basin, Mato Grosso State, Brazil. More