Can you change surface and underwater time ratios? Then it is best to make it like 99% to 1% for the snapping turtles. But even then they will not spend most of the time on the bottom which will look weird. They will always float in midwater...totally possible in terms of the hippo but you’d lose out on all the turtle animations. probably better to use the tortoise and for the time being at least, they can wade in shallow water and it’ll look pretty good for some large scale lakes and what not.