Hey I'm semi new (only 2 years) and I noticed like 5 bristle worms that come out at night in my pico tank. (3 gal) I was wondering if i should be concerned they don't seem to be hurting the corals but can they sting me? Should I wear gloves in my tank? Thx (sorry for the bad photo I'll try to get a better on if someone can tell me what kind it is)