The maximum shell length of this species is up to 500 mm, usually around 300 mm. This large shell has a bulbous or nearly oval outline. Its
columella has three easily distinguishable oblique folds. The
aperture is wide and near as long as the shell itself, and there is no
operculum. It has a very large, inflated and posteriorly expanded
body whorl. One of its most striking characteristics is the shoulder with prominent and curved hollow spines. These spines tend to become obsolete in later stages of growth. The
spire is usually very short. The color of the
Melo amphora shell is said to be highly variable. It is commonly mainly coloured brown, white, or pale orange. It usually presents spiral darker brown banding. The interior is glazed, and is commonly coloured cream or pinky orange. ==Life habits==