You are admiring an outstanding specimen, a Muricanthus radix (Gmelin, 1791), w/operculum & measuring a very nice 106.3mm & graded F++/Gem...amazing form with incredible spines along with a gorgeous, super dark color pattern displayed...a fantastic specimen!!  This beauty was diver collected at 18m from Golfo de Papagayo, Costa Rica.  A member of the Muricidae family, rarely seen today which makes this a wonderful addition for your collection.  Thank you for visiting our store...& an excellent choice, too.