Hi larryreinhardt, welcome to the forum...
By chance, were you the fellow with the koi farm near Holopaw FL ?

I too, am supposed to have 'blues'. I have some blues in a 55 gal aquarium in the house. They seem to always be changing colors. Even the ones with vert. stripes, seem to lighten and darken at times.

I'm guessing that 'most' tilapia in FL , have been 'crossed' at some time or another. Nile were introduced to one of the lakes...back in the early 60's. They were surprised they managed to spread... ...
Here's an article that I just found on 'spotted' tilapia in South FL ( which I didn't know about)...
http://www.flmnh.ufl.edu/fish/gallery/d ... lapia.html