More hitchhiker help.

[JVS55]

This worm came out from under the live rock. Any thoughts on harmful or beneficial?

 

[ReefLuck1123]

Looks like a good size bristle worm, watch your hands near it but it's gonna eat left overs in your tank & hide most times if you ask me. The opinions seem to vary on whether or not it's a big deal. I don't like them, but don't worry about them.much either unless the get big. How big is it?

 

[JVS55]

Looks like a good size bristle worm, watch your hands near it but it's gonna eat left overs in your tank & hide most times if you ask me. The opinions seem to vary on whether or not it's a big deal. I don't like them, but don't worry about them.much either unless the get big. How big is it?

it was stretched out to a good 4.5 to 5 inches

 

[MrDLHughesY]

it was stretched out to a good 4.5 to 5 inches

Yeah looks like a bristle worm but could also be a fireworm which on the other hand are not good.

 

[ReefLuck1123]

That's a decent size at 4-5" long, I would personally get him out if you get the chance but it's not likey to eat your corals or fish... unless they are already in bad shape/dying. There's also probably more in your tank that you haven't seen yet. I used to only catch these guys out at night, and maybe when feeding. I'd pull it out if you can (not with your fingers tho, those bristles can hurt) but if you left it I doubt any real issues would come of it. My 2 cents...