I got this guy a few weeks ago and he hasn't moved from his spot in the sand next to a rock. He stays open pretty much all day and his mouth isn't gaping - not displaying any signs of ill health that I can tell, but anything I offer to eat, he won't take. He might bring it in like he's going to eat it, but then his tentacles come back out and the food just hangs there til a fish or shrimp comes along. Tried small pieces of fish, mysis, brine. Are they just super slow eaters and he would eventually eat it if it weren't for the thieves? Or am I feeding the wrong stuff? If I can't figure it out or he needs a tank without shrimp and a nosy tang, I may have to rehome him.