This thing is HUGE easily 10 inches long, and just wondering if he's a good guy or a bad guy. He likes to come out at night and eat the leftover food off the floor.
They can start to eat things you do not want them to eat. Also if it is that big I am sure you have plenty of babbies and removeing him will not effect your tank in any noticeable manner.
Wow, that thing's a monster, lol! I'm with Joe, you probably have loads of little wormie babies in there, so don't feel like you'd lose much cleaning power by taking him out.