Ok i usally know what sex a tort of this size is. This is a 12in sully i really think it is a Female because the anal scutes are pointing in but it has the longest tail i have ever seen if it is female and its under side is concaved. So let me know what everyone thinks.
I have some females with slight concavity so that's not a deal breaker for me but you are right, tail looks awfully long. Do you have a pic of whole tail?