Home > Invertebrates > Bivalves > Isognomon incisus

Updated 8/20/2025

Family Isognomonidae

HAWAII - ENDEMIC

Isognomon incisus   



Kahalu'u tidepool, Hawaii


Ala Wai harbor, Oahu, 1 foot

Kuki'o, Hawaii
   
   

INCISED PURSE SHELL

Clusters are common within crevices on reef flats or attached to rocks in shallow water, especially areas with freshwater input.  Dark gray or purplish-brown with dark margin and heavy coralline deposits, interior gray with purplish margin.  Attains 2.4 inches, 60 mm.  Endemic to Hawaii.