Worm for Reefraf

[Aquattro]

Most of these worms are harmless and are useful in that they stir the sandbed and consume detritus. Once in a while you'll encounter one that has a bad habit of eating snails or clams. I've had a lot that were just fine, but I did have one about 2 feet long that ate my snails.
Basically, if you don't catch it doing bad things, it's probably good to have in your sandbed.