Green Brittle would probably be more at risk from a Trigger then the other way around. :laugh:
But yeah, a Green Brittle would be more of a risk to fish. More of things like Blennies and Gobies then Tangs. I mean, it could potentially get a small Tang, but Green Brittles are ambush hunters. They prefer to go after fish that like dark caves with green ceilings (which is serves the fish right, NO ONE should like a green ceiling). A Chocolate Chip wouldn't hurt a fish (well...it couldn't catch one so you'd have to ask it if it would like to hurt the fish, assuming it could catch it). It could potentially wipe out more money though since it could take out a large portion of a reef tank.