Trapping Fox Face

[Enigma]

I'm entertaining the idea of getting a very small one spot fox face to help with my algae issues. I certainly couldn't have it in my system for very long. I'm not sure how quickly they grow, but at a max size of 7" inches that is just waaaaaay too much fish for my already pretty heavily stocked system (which will be officially overstocked when everything reaches adult size).

Are they easy to trap? Would nori clipped into a fish trap be sufficient to entice one if algae is very limited? I am completely against tearing my display apart to get one out.