Hi David,

Thank you for your inquiry.  Let me start by saying bristleworms can be a valuable part of a good clean up crew in a reef aquarium.  Many people like having them in their tanks.  Having said that if you are looking for a crab that will eat them, Arrow Crabs will go after them.  Some do not consider Arrow Crabs 100% reef safe, but many people do have them in their tanks without any issues.

If there is anything else we can do for you please let us know.

Keith M.

Marine Depot Customer Service