Home > Invertebrates > Shells > Rissoidae > Rissoina costata

Created 2/22/2026

Family Rissoidae

INDO-WEST PACIFIC / HAWAII

Rissoina costata



Makapu'u, Oahu, 3 feet, 4 mm
   

RIBBED RISSO

Common under stones or rubble in shallow water.  Glassy inflated whorls with strong axial ribs and spiral striae between, protoconch of 1.5 whorls, a deep notch at base of body whorl.  White or brown.  Attains 0.2 inch, 5 mm.  Mauritius to Hawaii, French Polynesia, and Rapa Nui.  Rissoina turricula is a synonym.