My Tribe told me to stay with the lvl 134 turtle because cwe did not have taming stuff with us and we did not want to lose the turtle. I rode the turtle and a rex came i tried to kill it but i almost died but the turtle killed the rex my tribe got back and we tamed the turtle they let me have it since i saved it and decided to stay with it. Thats how i got my lvl 186 turtle.