Centrostephanus rodgersii (A. Agassiz, 1864)
This is not a Mollusc. Other non-Molluscan Phyla (Echinodermata, Brachiopoda etc) have been included to help identify species that may be mistaken for Mollusca, but are not.
Echinodermata (Phylum) > Echinozoa (Subphylum) > Echinoidea (Class) > Euechinoidea (Subclass) > Diadematoida (Order) > Diadematidae
(Family) > Centrostephanus
(Genus) > rodgersii (Species)
North of the North Island, the east coast of Australia including Tasmania, New Caledonia, and Lord Howe Island, from 0-30 metres
Marine, Long hollow spines, brittle, and sharp