In Paramonia, you had to whistle to get past some mudokons, so wouldn't it make sense that the muds living in Paramonia trained the Elums? Aww yeah.
And in this picture, it looks like Mudokons ride Elums regularly.
Looks as if they could be used for hunting, war, or both.
Good job on the 10,000 posts, Xav. What a historical moment it must be for you.
-oddguy