Checking out my sand, I can se a ton of little worms, a little thicker than a thread and opaque. They lize in the sand either in holes or sand surrounding them to create a hollow sand tube stuck together with something that many worms live together in. I am sure these don't cause any damage, but I was wondering what they are and any fish that eat them. I am not trying to get rid of them, jest wondering of a species that will be kept fed on these buggers.
P.S. Dont worry, I wouldnt have the worms as the nly pat of the diet, just a supplement to keep the fish healthy.