hi, went to see my turtles yesterday morning.. a large black ball of something was coming out of his bum?? it didnt drop lose just went back in!! whats the problem? seems to be ok today

Did it look something like this?

Sounds like your turtle flashed his male organ at you. So long as it was retracted back into his body on its own and didn't remain outward/inflamed/infected (possible prolapse) everything will be okay if he seems to have trouble retracting it in the future or you have another turtle in there be sure he isn't having it nipped by another turtle or allowing it to bump into hard structures.

ok thanks folks.. scared me for a bit. yea was like that. maybe fancies the musks.... glad it seems safe now. ta