User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4775842-20120813183201/@comment-1011548-20120814095629

It's certainly a puzzle, and now we've all given it much more thought than Capcom ever bothered to.

Regarding Guran's eating habits; the teeth look carnivorous, but there isn't a lot of food (that we know of) in the Disastrous Sea, and it's really damn slow and ponderous, both in water and out. So, perhaps it's a general scavenger, eating seaweed, shellfish, and carcasses that wash up on the shore?