Reptile & Amphibian Forums

I purchased some live rock and have noticed what i think are spaghetti worms. Are they harmful? If so how can i remove or get rid of them or what type of fish or invert might eat them?

i've never felt that spaghetti worms are anything to worry about. if indeed there are multiple tentacles that emerge from some place on the rock and expand through the tank, retracting with any outside disturbance (hand in the tank, tapping on glass) then they're great. what i've heard they do is just forage out on top of the sand and pull bits of detritus back to feed on. they're a cleaner species as far as i know. not harmful, but beneficial. consider yourself lucky! if you really wanna get rid of them, though, and you don't have any other inverts in there at all, dose 'em with copper. but make sure you run carbon or cuprisorb for a couple days before you add any inverts. copper kills all inverts. if you want a more natural way of doing it, certain wrasses may be able to finagle their snout into the cave your worm is hiding in. but my advice is to leave them alone and let them do their thing. i've never seen one kill a fish or do anything bad to a tank.