The Nassarius Snail acts as a brilliant cleanup crew and makes a terrific addition to any reef tank. They feed on detritus, and eat away the uneaten foods, fish waste, and any dead organisms.  The Nassarius Snail love to stay submerged under sand bed and are not seen much over the surface.  They are basically small, around 1/2 to 1 inch, but with a big appetite.  As the Nassarius Snail spends most of the time buried under sand substrate, it is recommended to keep them with well versed aquarium with live rocks and enough sand substrates. They are completely reef safe and peace loving, and thus don?t harm any other inhabitants. Lower amount of nitrate is advisable as the Nassarius Snail cannot tolerate high nitrate levels. They can typically find enough food in the sand beds but if not then they can be provided with frozen meaty foods, such as brine or Mysis shrimp or pieces of fish or scallops.