Originally posted by Fzanco:

If boat transport or even portalling lox was possible that would increase their usage heaps for me

I used the Teleport Everything mod to move a lone lox from one island to another after the rest of my herd was slaughtered by nighttime fulings. It joined my other lox in a meadow camp. Those I rode quite a distance through black forest to their new home. That's pretty much all the riding I've done.