Re-Uping this thread as it's been 10 months and never did update as to what happened. The worm was definitely a Oenone Fulgida, not sure if there's a more common name. One night i watched this worm come out of it's hole and attempt to take out a blue legged hermit crab. It crawled under neath the hermit and injected some sort of stringy dart into the underside of the crab as it crawled away i could see a small strand as the worm tried to pull the crab back toward it. Most certainly a predator. I tried catching it several times, most often comes out at night only and is light and vibration shy, which makes it difficult to sneak up on. As i had mentioned earlier in the thread, they are EXTREMELY FAST. I eventually got fed up and took the rock out and placed it into the oven at 350 for an hour, BYE BYE!
Then...about 2 weeks ago i bought live rock and livestock out of another canreef members tank. The purchase also included a very large turbo snail. A week after the purchase and transfer to my second tank i can see the turbo on the sand bed with a sneaky worm working his way inside the snails shell! It turns out i have another one
I don't have a photo of this one but its more cream/brown colored with yellowish legs. Similar to this...
Round 2, FIGHT!
http://forums.saltwaterfish.com/t/35...-fulgida-worms
If anyone sees these hitchhiker worms in their tank, I'd highly recommend following the link and instructions provided and attempt to catch it, unless of course you don't mind dead snails and hermits.
My very large Turbo Snail as of yesterday has
succumbed to his injuries RIP
Aside from killing your CUC they will however devour a large amount of wasted food in one sitting such as silversides, aside from the gross slime i guess that's a good thing