Hemiodopsis Hemiodus is a genus of halftooths from South America with the greatest species richness in the Amazon Basin, but also found in the Orinoco, Essequibo, Paraná–Paraguay and Parnaíba River basins.

[1] Depending on the species involved, these elongate fish reach a length of 7–30 cm (3–12 in).

[1] There are currently 21 recognized species in this genus:[2]

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