need Id but no pic

icemountain

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Maybe you guys can help me out. I have no picture because this is something I just saw 15 minutes ago. I have had my reef setup since January of this year which was the 65 and recently moved to the 125. While everything was still in the 65, I have this one rock that has a couple of frag sized holes where you can just shove the base of your typical ceramic frag plug into it and it holds it perfectly without it sticking out obnoxiously. Sometimes, I would just stick plugs in just to hold there temporarily until I find a suitable spot. When I didn't have plug epoxied in the hole, somehow the plug would always be out the next day. I always tried to figure out how in the world are the powerheads able to lift up the plugs when I had to do some twisting and pushing to get the plugs in nice and snug. Well a bit ago, the same thing happened from the same rock that I moved to the 125. I turned my blues on to see if it was upside down on any zoas nearby and what I saw kind of freaked me out. I saw 3 legs sticking out of that hole where I had put the plug in and they were kind of hairy. All this time, it was whatever that thing is that was pushing out the plugs from the hole. First thing popped to mind was a spider/tarantula type invert. I didn't see any claws or anything but just a few legs. I took the hood off to see if i can get close enough with tweezers to grab it and pull it out but it went back in and I lost it in the hole.

I haven't had any missing fish/corals since i started the tank in January with the same rock. I actually have a lot of zoas and a few sps around that hole. I was thinking of taking out that rock and just putting it in a bucket of revive to see what pops out but that would be too much. Whatever it was, it hasn't hurt anything. It just looked super weird and first time I have seen an invert like this in an aquarium. Sorry about this long rambling but thought I'd give a little history to see if that might help someone figuring out what it was.
 

Connie

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Yeah, sounds like a crab. You can run it out of the hole without taking it out of the tank. Just squirt a few drops of peroxide into the hole, being careful not to let it get on your surrounding corals. The crab should come running out. You can try aptasia killer, lemon juice or vinegar too. The peroxide will probably kill it. The other items should just run it out of the hole. Use only a TINY bit of peroxide or vinegar, as it can kill other things around it. If its legs are hairy, it will eventually start eating your other inverts.
 
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icemountain

icemountain

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Thanks guy! I don't know if vinegar or peroxide would work since that hole goes through the rock and it can just run the other way out the underside of the rock.
 

Bovine

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sounds like it could be a small brittle star too . i know i have some and they stick out one or two arms at a time.
 

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