Pteroidichthys is a genus of marine ray-finned fish belonging to the family Scorpaenidae, the scorpionfishes.

The scorpionfishes in this genus are distributed in the Indian and Pacific Oceans.

Bleeker thought that this taxon was close to the lionfishes but was distinguished by, among other features, the lack of head spines.

[2] There are currently 4 recognized species in this genus:[3] Pteroidichthys scorpionfishes have a body which is strongly compressed and elongated, the width of the body is equivalent to 10–24% of their standard length while its depth is equivalent to 28–40% of its standard length.

[4] Pteroidichthys scorpionfishes are ambush predators and tend to be solitary fishes.