Quote Originally Posted by Anonymoose View Post
It's possible that it was another entity, but everything says Leviathan to me... it's in LL, its presence correlates with treasure taken from an island said to be the mythological place Leviathan is bound to, it's heavily ingrained in Limsa's lore, and so far the only sea beast we know for sure is is Leviathan, and we see it destroy several boats with what I must assume was Tidal Wave.

Much like my standards for discounting an assumption until shown otherwise, that's just too much for me to not make the assumption until shown otherwise.
So you agree that Yoshi-P kills the old model of Leviathan as shown in that concept art in my post?