I wasn't trying to get rid of mushrooms, but I picked up a rabbitfish this weekend and he has wiped out my regular mushrooms in just a couple of days. I'm no expert and the shop had him labelled as assorted rabbitfish, but he looks most similar to siganus puellus. He did not bother my giant green hairy mushrooms, sps, acans, duncans, chalice, or zoas, just the run of the mill mushrooms. Quite an attractive fish and always out in the open.