one of my favorite fish. Striking yellow and a gracefull swimmer. Mine effortlessly cruises around the tank on currents and pecks at the rocks and sand all day.
They are one of the best security measures for a reef tank. Mine picks every frag I get clean of pests. It cleared out a zoanthid nudibranch problems in a matter of days. They can be a great first line of defense against any bad nudibranch and many other pests like pyramid snails..
Mine has not really bothered snails that I have notoced, even though i have countless small ones. It seems to stay focused on my amphipods, which i have plenty of. I think it is just a matter of it preffering them and having more than it will ever need in pods and my feedings. It is the fattest fish in my tank....