I just got an azure damsel because I thought this kind of fish was easy to care for. However, he doesn't seem to eat. He spends all his time backing in and out of a hole in the rock he prefers, or comes out just to hover around it. I tried two kinds of pellets - Dainichi Marine FX baby sinking, and Omega One small pellets with garlic. I also tried a bit of the frozen cubes for carnivores. Even when this fish is swimming a bit away from his rock, he seems oblivious to the food I am dropping in. How should I be delivering his food and what should it be?