species: Naria erosa in taxonomy (Lizard Island Field Guide)
Naria erosa

©Barbara Banks: Naria erosa About 3 cm long at Horseshoe Reef, Lizard Island

©Barbara Banks: Naria erosa about 3 cm long at Horseshoe Reef, Lizard Island

©Lexie Gersbeck and Gabi Howarth: Naria erosa about 4 cm long from the Loomis Reef and Research Station area, Lizard Island.
Kingdom Animalia
Phylum Mollusca
Class Gastropoda
Order Littorinimorpha
Family Cypraeidae
Genus Naria
Species Naria erosa



Distinguishing features

A solid shell with a distinctive thick margin. Pale blue/grey above with brown patches and many small white spots. A distinct dark blotch is usually (but not always) present on each side which extends onto the underside which is otherwise white. Strong teeth line both sides of the aperture and extend nearly to the margins.


  • Up to 5 cm (length according to Wilson, 1993)



©Atlas of Living Australia: Australian distribution

Web resources


References that assist with identification

  • Wilson, B. (1993). Australian Marine Shells: 1. Prosobranch gastropods Odyssey Publishing, Kallaroo, Western Australia.

Other references

  • Robertson, R. (1981). List of shell-bearing mollusks observed and collected at Lizard Island, Great Barrier Reef, Australia, Tryonia, 4: 1-32. LIRS catalog number 403.