upside down turtle

hello i have a razor back musk that has been basking upside down with her head in the water. i just recently captured him about 2 weeks ago. There was a dam that part had busted and it was pulling its occupants down to a rocky death so i grabbed 4 common musk hatchling and the mature razor back...

Yesterday i had the fright of my life! I looked at my turtles and the smallest female was upside down! Naturally, the worst went through my head and i thought she was dead, however as i got nearer to their tank she suddenly saw me, shot upright and headed for cover under the floating log!! Im no...