This fella's going all piscine, and seems quite OK aboutthe whole thing. Good for him.
He's meant to be turning into the same kind of mer-person as Rikuo/Aulbath from Darkstalkers, but the colour scheme is a little more subdued. Also stripes. Why not?

Yet more visual nicety by Kuma
http://www.furaffinity.net/user/kuma/