the bottom corner almost all the time.? Im not sure what kind of goldfish it is, it is gold except for the top edge and tail, they are black...I have a shell near the corner and goes right behind it. All the other fish seem to be doing fine. I see no breathing problems either. I just just the new tank three days ago and let it sit empty for 24 hrs before i went to add fish. I let the fish sit in the tank, bag unopened for 15 minutes and let them out. They were all active during the first 2 hours, then this goldfish put his dorsal fin down and just sat there. I try and get him to move, but he just sits back down. Please help me. If you need and further info, feel free to email me, [email protected]