Leyvaichthys Dahl, 1960 Helogenes is a genus of whale catfish found in tropical South America.

Helogeneinae is the sister taxon of Cetopsinae, the other subfamily in the family Cetopsidae.

[1] There are currently four recognized species in this genus:[2] Helogenes species occur through much of the Amazon River basin, the southern portions of the Orinoco River basin, the coastal rivers of the Guianas, and at least the lower portions of the Tocantins River.

[4][3] Helogenes species grow to about 4.3–7.3 centimetres (1.7–2.9 in) SL.

[2] Helogenes species feed on allochthonous insects.