Worms?

[Craig J]

I was looking around in my tank Reef tank tonight with a flashlight and noticed a couple little "worms" wiggling in the light. They were following the light and they were right against the glass, not in the sand above it several inches. They're tiny maybe 1/4 inch and very very thin.

What are those? Are they worms? What do they do? Are they bad? Did they come out from the LR?

 

[Anonymous]

It's very unlikely that they are bad. They are probably very beneficial detrivores. There are many types of animals that fit that description, even some snails (Vermetid).