See text Rissoa is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae.

[1] The genus was first introduced by M. de Freminville for some small shells observed by M. Antoine Risso, a distinguished naturalist of Nice, France.

The tentacles are awl-shaped with the eyes on a small prominence near the base.

The thin and horny operculum is spirally marked and equally ovate, roundish or pear-shaped.

[2] This species can be found on brown algae (genus Fucus), in clefts of rocks, on stones, on mud or sand.