Yup….it’s a Bristle worm…thanks for the link.hard to tell with 100% accuracy from the pic. Here is what might help - https://arcreef.com/bristle-worms/bristle-worms-fireworms/
Will do, as long as it don’t eat my fish! LolBristle worm. Make sure that you're careful grabbing rocks! Those suckers are like a cactus and the bristles hurt like crazy!