I woke up yesterday morning to find one of my golden headed sleeper gobies suck between the back of my tank and tube of my skilter. His eyes were popping out and his gills were wide open. I got him unstuck and he dropped to the bottom of the tank. I thought he was going to die for sure. I had to go to work so i left him there swimming upside down. When i came back i saw that both gobies were on opposite sides of the tank underneath rocks. I could see the tail end of the goby that was sick so i thought the other one must of buried him under sand, so i was getting him out and he took off. He was swimming upside still but not as much and he also was moving fast. When i woke up this morning he was swimming around again. Could someone help me? Is my Goby going to die or has he got a disease?