It may be the angle of the fish in the photo, but the fins from body to tip in height look a bit longer than a normal parrot, and the tail a bit bigger in proportion to the body. If the fish hasn't been cared for it may gain some weight and the fins could even out with the body then, too hard to tell now.
I used to see a ton of female parrots, almost never a male, now I'm seeing a mix for sale. In fact, I had a huge parrot that was a male, infertile as well. Some photos of it from the side might help to tell if male/female.