Cantharus Tranquebaricus, also known as Beige Whelk is a marine gastropod (sea snail) in the Muricidae family. I have personlly observed many of my hermit crabs choose to move into a Beige Whelk, they are the most popular choice of my 20+ crabs.
 
Available between 1.2cm & 1.9cm, please leave a note of your crabs current shell size is, if they fit well/too big or too small :)
 
If you need sizing/measuring help, please get in contact with me on facebook for assistance.