Well I really have no clue what normal is both of these two fish are new to my tank little over a week but I also noticed some missing guppies. . . . . Maybe that's the reason? I will cut down on the food the next couple of days and see though
Normal behaviour would be what is normal to most fish. Swimming actively, eating, not gasping at the surface, no clamped fins etc.
The second picture you posted it just looks like it over ate. The fins are in a normal position and I see no discoloration. I'd be willing to bet that the missing guppies are the reason for this.
I was super worried I have yet to lose a fish. Besides from aggression r. I. P. Earth mover. But since I removed the two Oscars all my fish seem pretty happy