For the second time today ill recommend a yellow corris wrasse if you have the space for another fish , they eat all kinds of nasty worms . Mine ate all my bristle worms ,and peanut worms .

I wouldn't worry about that, just another critter to increase the diversity of your sand. I used to have lots of thoes, never did any harm.

I think a lot of people these days are in to much of a hurry to get rid of anything they didn't put in there, for me discovering new things that just "showed up" was part of the excitment. yes there are knowen nasty things that if you see, get rid of them, but this isn't one in my opinion.

Steve

+1 just leave it be. It's a detritus scavenger, kinda nice to have.