[ramonesfreak]

What does it do when not sleeping upside down at the surface? Does it otherwise act like you would expect a catfish to behave?

How did you capture it? Could it have been injured in some way? One year is a long time to behave this way if it’s an injury but, I have seen fish with spine injuries that lived but behaved very abnormally

Maybe it is a swim bladder issue but need better description of its overall behavior