Wow, those are awesome photos ezhoops.. I think I'm fallin' in love...lol
Greetings all, a quick update on the identity.
Dr. Fautin wrote me back this morning, saying "To me this is clearly *A. chrysopterus*, but it does have a yellow caudal fin. The fish taxonomist is my coauthor on the book, Gerry Allen. He has seen these animals throughout their range, and can determine if this is a variant of any species." Then she told me she sent the question on to Dr. Gerard Allen.
Later today she sent me a follow up, " He (Dr. Allen) confirmed that it is A. chrysopterus." (how awesome is that! drop-dead cool in my book!... they are so helpful!)
So the identity is now "in the bag" = A. chrysopterus
Thanks again for everyone's input, EC's help and direction, and... this has been a lot of fun!
(Oh yes, the book is older, actually written in 1992.)