The Naticidae Family includes 400 species comprising 5 subfamilies (Polinicinae (15 genus), Naticinae (13), Sininae (5), Globisininae (2), Naticidae incertae sedis (2))
and 39 genus (Natica (89 species), Polinices (41), Euspira (41), Sinum (27), Naticarius (21), Cryptonatica (17), ...)

Phylum      : Mollusca
 Class       : ⤷Gastropoda 
  Subclass    : ⤷Caenogastropoda 
   Order       : ⤷Littorinimorpha 
    Superfamily : ⤷Naticoidea 
     Family      : ⤷Naticidae

Common name : moon snail or necklace shell

Aspect : smooth, globose shell with low turn, large half-moon opening; columellar border thickened by a callus which can completely or partially mask the umbilicus; the lip fringe is fine and sharp; calcareous operculum; umbilicus (navel-like opening at the base) is usually open and deep;

Feeding : active predators specializing in drilling into the shells of other mollusks (especially bivalves, but also gastropods and scaphopods)

Environment : soft-bottom marine environments worldwide, from the intertidal zone to deep-sea sediments (down to 1000 m) in sandy or muddy bottoms, seagrass beds, estuaries, and shelf sediments