Help

My Dad's ARO jumped out. It jumped out like probaly 8 years ago i think and i threw it back in and it lived but this time its tail is floating up and hes trying to get down now 10 hours late hes upsode down with his stomach floating . hes alive but i cant figure out what to do so this is my desperate call. hes been with us for like 10 years i think

he is upside down with the back end floating upwards. i noticed when iu first threw him back in his back end of his body was floating up more. is this a air bubble?. i dont think this was a issue before he jumped out. im worried and i dont know what to do can anyone help