They would be perfect if there were Roswell aliens in Zelda.
Just kidding. It's nicely done, well proportioned, shaded etc. but unfortunately it doesn't look like a Zora. Most custom Zoras don't, to be fair. The shape of the head is a difficult thing to convey face-on at this angle of elevation.
With this style I think Bboy might be on the right track trying to put the tail to one side like they do with the GB sprites. Sometimes a bit of artistic license is needed when you're trying to squeeze something fairly complex into a tiny bunch of pixels. Plus they're taller than humans, so you could always use that to your advantage, give yourself more space to work in. I've just done a 2 minute edit, adding assorted fishy bits, and even though it may not be accurate design-wise, I think it's a bit more successful in capturing the likeness. But it's really just a rough idea to show you what I mean, darklink45:
