Better than I could do :D
Just noticed this, you may have done it on purpose, but the male betta's scales seem to be facing the opposite way.
Also on the female, one of the pectorals (I think it's the pectoral) has a really flowing look, while the one against the body seems to be a different shape.
Great job though, this will be a lovely tattoo ;)
I've always wanted one and I have permission, being under 18, but I just don't have the guts to go Dx