ARAGOCRETE SKULL FOR UNDER WATER CORALS OR AQUARIUM DECORATION- Made from the same material USAReefAquatics Frag plugs are made from, this skull is reef safe and great for most aquariums both fresh and saltwater. These Skulls are comonly used for those enthusiastic Coral Fraggers who love to give life to inanimate objects. Make a cool encrusted skull using your favorite favia, or Cyphastrea, or give it some hair with GSP (Green Star Polyps). The possibilities and looks are endless.!!! MAKES FOR A GREAT HALLOWEEN DECORATION AS WELL