A few months ago we got a flame angel fish hoping that as long as we kept it well fed it would leave the corals alone. It worked for a long time. 3 weeks ago it finally started nipping at our SPS corals. We tried to catch it with a net and nothing. We tried during feeding, in the morning, at night and nothing. It's just too fast and smart. Finally the staff at barrier reef suggested making a fish trap out of soda bottles. It worked. Now it is in our fowlr tank.