eunicid worm

Luckily I just pulled an 8" Eunicid worm from my sump today that was on the glass of the return section. I've only had the tank running for 10 months now, but used a bunch of rock from my previous setups. Is it more likely than not that there are others in there as I have had mysterious fish...

I picked up this Biocube 32 last month as a slight upgrade over my previous 20 long. Life got in the way and the 20 long fell to the wayside. It was turned over to a FOWLR tank and someone else took care of the tank after I moved into my first house. Between the new job and being a first time...