Agaronia gibbosa is a species of sea snail, a marine gastropod mollusk in the family Olividae, the olives.

[3] The shell is heavy and gibbous, with a notably callous columella, particularly thickened at the upper part.

The shell is primarily cream-colored, with the body whorl featuring zigzags and reticulations that range from ash-gray to orange and chocolate.

In its natural state, the shell of Agaronia gibbosa is usually a blotched greenish color with a striped yellow band at the siphonal end, though the species also comes in an all-yellow variety.

This species is common in the shell trade and it is common for the outer layer of the shell to be polished away, revealing a brownish-black color underneath.