usually the other healthy fish would show and move their tails and fins, but this one didnt, he folded his pectoral fins to the side of its body and fold his tailfins like when you're done using scissors (you get the picture right?).

tho it can still swim around in its regular speed, but when it stops, his head kinda floats to surface while his lower body parts move down and sometimes losing balance...

could this be swim bladder disease? or is it some other disease? it swims and eat like usual... what can i do to help the poor creature?
pls help thanks!