[Lampshade]

Different opinions about them, some people like them, some want them out. I love them in my tank, never had any problems. They are carnivorous though, so there's stories of them eating clams and fish... but they're known for mostly being scavengers, which is probably what people see them doing and blameing the worm for the kill.

There are fire worms that look close, and those can hurt like a SOB when you aquascape and accidentaly touch them. I was shocked that they actually hurt that bad.