does my fish has swim bladder disease?

[George]

It's definitely having some kind of problems. If it's a new fish, I will say it's swim bladder. Swim bladder problem will usually show up not long after the fish being collected (days or weeks). Since you have the fish for over 1 year, not sure it's the swim bladder that get damaged.
I also echo the suggestion of getting it to a QT and hit it with maracyn and maracyn-2.
Good luck and let us know how it goes.