Bristle tail filefish to eat majanos?

[Bongo Shrimp]

So I might have let the majanos in my 29g biocube get a little (way) out of control. And I really don't want to start pulling all the rock out and messing everything up. I heard a bristle tail might eat them. I am a little nervous about my big clam and corals but if have heard mixed things.

Any insight?