Jinx
Aquarium Advice Regular
Not sure about the worm, but it doesn't look like anything harmful that I know of. Do you know where your rock came from? I mean, what country...That can help you/us with the I.D.
To be absolutely honest no I can't. The LFS owner I bought the tank from was relocating his store. I live near Panama City here in Florida. Many pet shops kennel pets and tanks for the seasonal residents. My tank was an abandoned tank by its owner. We call them "snow birds" down here because they migrate south when it gets cold up north.
All I paided for the BioCube and all the corals plus muck was the unpaid kennel fees.