Being a deep water fish, they are wry prone to swim bladder problems. I had one for years ( he just recently passed ) with a bad bladder. It didn't seem to effect his general well being much, he just would tend to "bob". he adapted well and actually acted more like a hawkfish, as would perch on a rock or hold himself on the side of a rock with the tips of his fins.
While his bladder was always somewhat swollen, the size would vary. I found that if he fed from the surface.. Like a bass feeds... It would get worse. I always tried to get his food to sink, so he didn't get any surface air with it.
Mine lived for 3 years. He adapted.
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