Dermechinus horridus (A. Agassiz, 1879)
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 actually are not.
Echinodermata (Phylum) > Echinozoa (Subphylum) > Echinoidea (Class)
> Euechinoidea (Subclass)
> Camarodonta (Order)
> Echinidae (Family)
> Dermechinus (Genus)
From 200-1200 metres