I be all for killing bristle worms. I don't have a lot of hatred in this hobby, but bristle worms top the chartLooking good! It should. Even my testy guy snaps away but nobody is harmed. All snails, shrimp, fish accounted for. I think he snaps at bristleworms and also as just a warning, not necessarily to harm... Watched him go up to my anenome the other day and slowwwllyly reach an arm out to touch a tentacle; it jerked its claw back a few times like it was being electrocuted lol and moved on