How pretty! How many gallons is the pond? How deep is it? It's a really cool design, I'm just trying to get an idea of how it looks like not so close-up. And I've never heard of watonais, I will have to look those up.
Editing to say I looked them up, they are really pretty! In fact, I have a few with tails like that, they are my favorite, too. I had two others, but bull frogs got them! I have since caught one of the frogs and relocated him to a large town pond. The fish with tails like that I still have are white, really kind of pinkish. Oh, and one red one with black spots.