Our Desjardini Sailfin Tang lives with two puffers (Porcuping & a Green Spotted). I think since he lives with them, he thinks he is one as he eats clams and other food with get for the puffers. Here is a video showing how he interacts when feeding the puffers a clam.
This is a custom canopy I built for a 180 gallon tank that I used gas shocks to assist in lifting and closing as the canopy was very heavy. A lock keeps the canopy open and a simple pull and assist the canopy closed. This is a demonstration of how easy it is to open and close.