Turbinellinae are a subfamily of large deepwater sea snails, marine gastropod mollusks in the family Turbinellidae.

[1] This subfamily is in the family Turbinellidae within the clade Neogastropoda (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).

The species Syrinx aruanus (Linnaeus, 1758), the largest living gastropod, is distributed along the coasts of Western and Northern Australia to Papua New Guinea.

Species in this family have thick-shelled, fusiform shells with conical-shaped whorls.

The large body whorl ends in a long siphonal canal.