The Nassarius Snail, Nassarius sp., is an excellent reef scavenger. Their trunk-like tubes extend from curved shells while searching the sand, tank wall, and rock for microfauna prey. Nassarius Snails are capable sand-sifters as they can sometimes burrow in search of food, often detritus. Nassarius Snails require minimal attention and will thrive without any care in established reef tanks with plentiful live rock and algae. Overall, these snails are incredibly beneficial and are often instrumental in keeping tanks clean and operational.
The XL sure are some cleaners, and they can work up some sand.
These snails are very hardy. (my group of 10 were just about the only things to survive a 6 plus hour delay by fed-x) They are very active and clean the sand bed as well as the glass.
The XL is the biggest Nassarius snail I've ever seen! Great for cleaning up the sand bed!