That's a good one cheez! LOL! I did the same thing once.
One year maybe 10 or so ago, me and a buddy laid a 16' hoop net in the Black Creek to see what we could catch. Early March brought only channel cats. Late March, early April it was all big blues. For the next two months, that sucker was packed out with nothin' but river cooters. No lie, we could smell that thing 5 miles literally before we got to it. You know, 'cuz they die 'cause they can't come up for air. We did real good for the months of July and August with exclusively giant flatheads up to 71 lbs. We used to do some messed up stuff with them cats' heads to people we didn't like.
Anyhow, believe me when I tell you this, those turtles are a real mess when you got 2000lbs of them stinky nasty dead ones in your hoop net. Last time we checked it, the smell was atrocious. Both of us were throwin' up and for two hours we couldn't budge it off the bottom. We didn't want to leave it for fear that it would stay down there and catch and kill catfish. Even hookin' the rope to front of the boat and trying to drag it up on the sandbar wouldn't do nothin'. Finally we broke it loose from the bottom and when it rolled up to the surface, this big bubble of stink must've come with it. Man, we cut that rope and hauled @$$ for the high heavens, hurlin' the whole way. I ain't never ever smelled nothin' to this day like them nasty dead turtles, and that includes the time we had to manhandle a big deep freezer full of rotten beef and fish we had in our burned down house in the middle of SC's, July heat.
Needless to say, we never laid another hoop net anywhere and I don't think I ever will again. We never felt bad about leavin' it, 'cause we figured it was mostly dry rotted anyways, and by the time them turtles disintegrated, the net wouln't be any more good, and the fish would just be able to bust it apart.