I'll be honest. The skin looks a bit overly shopped. It kind of appears like wax. If that's the intent, then well done. If not, I'd recommend toning it down a bit.
Otherwise, lovely image! Her costume is powerful, and it has a very surreal feel! Nice work!! The beta fish are shopped in well! Is the front one supposed to be out of focus to create a sense of depth? If so, great job!