Thank you! I didn't just post this without looking for other threads. There seems to be a lot of assumption around this topic without any real information, probably because it's not a trait that is obvious so people don't look for it. There are all sorts of little tells that may help you identify if the animal you're dealing with might have some interesting gene and it seems to me that tongue color could be one of them. It might not be important for a simple co-dom mutation, but if you look at something like a YB, then see the Super form... yeah, I think we could use all the info on possible markers that we can get!