Conus granarius is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails, cone shells or cones.

The spire is concavely elevated and not coronated.

The body whorl is smooth and slightly striate below.

It is irregularly marbled with chestnut and white, with equidistant chestnut revolving lines bearing white spots that are granularly elevated.

[2] This marine species of cone snail occurs in the Caribbean Sea from Panama to Venezuela; off the Caribbean islands Curaçao, Aruba and Bonaire.