This may not be a serious emergency, but to me it's becoming one and I'd appreciate any help. Having kept only reef tanks for the past few years, I haven't had any fish only tanks since the 90's. A couple of months ago I set up a FOWLR tank, and about four weeks ago I added a small (3") Porcupine Puffer and a Niger Trigger about the same size. I've kept several of these in the past and they are some of my favorite fish. They have always tamed quickly and ate like hogs. Well, the Trigger got over the initial "shyness" and is eating everything in sight, but the Porcupine won't eat anything. He just swims up and down the walls of the tank and totally ignores any food. I've tried frozen shrimp and clams, but neither interest him in the least. I decided maybe he was one that wanted live food, so I tried some very small feeder fish. The trigger ate them all and even though some swam right in front of his face, the puffer wasn't even interested. I don't remember this ever being a problem with Porcupines! Usually within a week or two they were eating out of my hand. Any ideas? Thanks in advance.