This image has great shading, haven't seen much of this sort of art on deviant art.
I think it's very good, nice texture and realistic shine. I'd probably like it a lot more if I didn't hate fish in general (with the exception of a very few of the prettier fish, like koi)
Why would you hate fish?
Because when beauty and charm was handed out, most fish were standing well behind a door In fact, they seem to have gotten an extra helping of ugly, mugly, and slippery. Nor are they redeemed by their awful small that takes forever to wash of and wash out, and the terrible taste isn't endearing them to me either.