Home > Invertebrates > Shells > Nerites > Neritona granosa

Updated 4/27/2021

Family Neritidae

HAWAII - FRESHWATER ENDEMIC

Neritona granosa 

Right, Iao Stream, Maui

Waikolu Stream, Moloka'i
   

HIHIWAI

Locally common in the middle reaches of pristine streams attached to algae-covered boulders.  Shell dark brown or black with raised pustules and a white aperture.  Threatened with extinction due to water diversion and streambed alteration.  State law prohibits commercial sale of this edible delicacy.  Attains nearly 2 inches, 50 mm.  Endemic to Hawaii.  Formerly known as Neritina granosa.