Originally posted by Emelio Lizardo:

Apparently Players are not the only ones capable of stupid unnecessary death.
https://steamcommunity.com/sharedfiles/filedetails/?id=2977123046
This idiot swam out to sea in a storm (ground is shaking)

Importantly this seems to indicate the possibility that (land) critters are subject to the same water stamina limitations as the player. I've wondered about that and now there is a data point. Maybe a DEV can comment.

I have a base built up to be 8m above calm sea level extending out quite far. Trolls used to venture out there when they could still stand and peak over the top, but then I extended it out a few more metres and they never even try. However, greylings swim out there all the time. 'Cuz they're stupid or something. If I don't shoot them to put them out of their misery, they'll literally tread water forever.