Dead slaughterfish doesn't float to water surface after loading saved game
How to reproduce
- kill slaughterfish (it will float to the water surface)
- save game
- load game
-> slaughterfish is on ground (underwater)
Debian 9, OpenMW@9ecdcc187f
IIRC, this is how the vanilla game behaves, and it's a simple consequence of the fact that actors aren't supposed to float if they were already dead by the time the cell is loaded. There are some underwater corpses in a grotto that are supposed to stay underwater.
With that said, I'm not saying a fix isn't possible.