Neon Blue Acara question

[Punchy]

Hi, I have a male Neon Blue Acara who for the last week or so has been spending a lot of time diagonally nose down when stationary. He is still eating fine and when he swims he is horizontal. I've had him for about 3 months with a female and they have mated a few times but i haven't seen this behaviour before so doubt its a mating thing. My first thought was a swim bladder problem but don't think its that as he isn't sinking or floating irregularly. Has anyone else seen this and should I be worried?

Thanks

 

[Colin_T]

can you post a video of the fish hanging nose down and swimming?
upload it to YouTube and then copy & paste the link here.