Conus genuanus, common name the garter cone, is a species of sea snail. Like all species within the genus Conus, these snails are predatory and venomous. The ground color of the shell is pink-brown or violaceous brown, with revolving narrow lines of alternate white and chocolate quadrangular spots and dashes. This species occurs in the Atlantic Ocean from the Canary Islands and Cape Verde to Angola; in the Indian Ocean along Madagascar.