thats what it seems like. ive been watching it, and it looks like it floats instead of sinking to the bottom like other fish. its not a new fish, and i havent done anything abnormal to it recently. the reason why it looks like it floats is cuz whenever it stops swimming or moving its fins, it just starts to go up! is there some sort of disease that does this? should i be worried? its stomach is normal sized, it looks normal in every other way