Home > Invertebrates > Shells > Nerites > Theodoxus vespertinus

Updated 11/26/2013

Family Neritidae


Theodoxus vespertinus 


Waikiki Aquarium


Locally common in the lower, often brackish, section of unaltered streams attached to boulders.  Threatened with extinction due to diversion of stream waters and construction of concrete stream banks.  Shell flattened, olive green with somewhat lighter underside.  Attains 1 inch.  Endemic to Hawaii.  Formerly known as Neritina vespertina.