Banded Coral Shrimp (Stenopus zanzibaricus) are known to eat bristleworms. But they can also open a new set of problems. May/will kill other shrimp in the tank. They are quite opportunistic IMO. Any outbreak of detrivores leads me to examine my feeding regimen as well. IME Most creepy crawlers in my tank wax and wane depending on available food.

good luck.......chuck