Did you get them all from the same source? I could be wrong but I think there are only one or two types legal for sale in Oklahoma. I get Moz. tilapia every year and they vary in color greatly. I could be wrong but they may all be the same type...

This may help also, I have not read it all the way so not sure.
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=203155

Last edited by jakeb; 10/12/12 11:31 AM.

Get out and fish.