Yeah, what Kipass said... I HAD some bristol worms... I got my CBS around 7 months ago. Make sure you feed him enough meaty foods. If not, they will lose their large claws when they molt. I hand-feed mine. He holds on to my wrist while he eats from my hand. Same with most of my fish too. Good iodine levels are needed to keep them happy and healthy, so I have heard. Mine seldom go at my fish, but he has nailed the yellow watchman a few times. It's only a flesh wound! Good choice in my opinion. Or you can spend a little more and get a GOLD CBS, more docile from what I have heard.