So I started cycling a tank today with some rocks purchased from a person on this forum(I won't name) . So I just got home and to my surprise , there's some hitchhikers I didn't see earlier. I see a few aiptasia , but the creepiest 3 inch multicolored worm with spikes books it in the rocks from my light. I'm guessing it's a bristleworm, but I've never encountered one before so I'm curious what to do about both of my new tank mates ?