Not enough oxygen for arow?

yawning or something but definitely not because of low oxygen.

It'll be yawning or stretching its jaw my jardini did this a lot whilst growing

I think it is normal specially when you over feed him. So just a heads up.

Gasping is not normal in any fish.... Might be nothing and just yawning but "hyperventilating" is a sign of a problem.

How long has the tank been running ? what size is it , whats the stock like , what are the parameters - temperature/Ammonia/N02/N03 etc. What sort of filtration/aeration are you running. How old/large is the fish.

Basically more details needed to have an chance at getting advise !