Nerita planospira

Nerita planospira is a species of sea snail, a marine gastropod mollusk in the family Neritidae.

Description
The shell is cream and mottled black in color with an inner surface of the flat-spired nerite smooth and white. It has a toothed shelf protecting the entrance. The outer surface is thick and roughly ridged, and tightly coiled.

Distribution
This marine species occurs off Papua New Guinea