I just kicked my powerheads into feeding mode to feed my tank. Seconds after the current died down, I noticed something I had noticed a couple times before, but this time something was different... There was what I can only explain as "smoke" puffing out of a hole of a large piece of liverock. Something I've seen snails do as well... sperm (I'm guessing). What was different about this, was the critter I saw when I leaned in to get a closer look. The head of this thing was probably 1/4 to 1/2 inch wide. I could only see the tip of it, but it was dark dark brown, and I could see 2 tentacles on either side. It looked a hell of a lot like the pictures I've seen of the GIant Reef Worms (Eunicid worm). GAAAHHHHH!!!!! I may never stick my hands in this tank again. I'm tempted to completely remove the rock I saw it in, but I have 3 different kinds of SPS attached to it, not to mention a couple different kinds of zoa's. I've been paranoid that there was one in my tank, because I've seen bits of light brown poo that looked just like a picture someone posted of this worm's feces. I wish I could find the photo again... I'm 100% creeped out and a sliver of a decision away from pulling that rock out and busting it up to make sure I got this thing out. Now... before I completely jump to conclusions... does anyone know if the Eunicid worm blows out puffs of (I'm calling it) "smoke" like that? I do have Stomatella varia snails in my tank... and there's a small chance I'm mistaking the two. I didn't have a great angle on what I was seeing. Is it worth it to yank that rock and possibly kill three small SPS? Also: If I dipped this entire rock in a bucket of RO water to kill and get this worm out (if that's what it is), would that be certain death for the corals?