Conus nodulosus is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
Like all species within the genus Conus, these snails are predatory and venomous. They are capable of "stinging" humans, therefore live ones should be handled carefully or not at all.
The size of the shell varies between 35 mm and 51 mm. The shell has an elevated, channeled spire. Its color is yellowish, delicately and openly reticulated with chestnut. The aperture is roseate.
This marine species is endemic to Australia and occurs off Western Australia.