Voragonema is a genus of hydrozoans belonging to the family Rhopalonematidae.

The genus comprises four species.

[2] Unlike most hydromedusae, these do not have a sessile stage.

Rather, they spend their entire lives in the water column as plankton.

Centripetal expansions protruding from the ring canal is a characteristic that separates this genus from other genera in the family Rhopalonematidae.