I got this Sleeper Gold Head Goby about a month ago, he is about 2.5-3 inches long. He looks very healthy and constantly sifting through the sand. However, I'm noticing that his stomach is caving in a little since I got him. Some people were telling me that they had success feeding them mysid shrimp. I tried that along with brian shrimp, but this guy just darts under the rocks as soon as I open the top, and I can't tell if he is getting any of them before the other fish finish them off. He is in a 72G tank with live sand substrate and 80lb liverock.The tank has been established for a long time before I added him, but I can't seem to spot any pods in the main tank, only in the overflow. I'm not sure if he is on his way to starvation. Anyone had success feeding these guys?