Would it be fair to say: Underwater Zombies

We here at AoF spend an inordinate amount of free time discussing the various aspects of Zombies. Topics have included the underwater viability of zombies, movement, development of brain function, whether scientific or supernatural explanations can sufficiently address all the varying portrayals of zombies. I'd say that George C. Romero has effectively confused the hell out of all of us.

I am no expert, but I believe that Zombies are subject to the same physical properties as a live person would be. Assuming no breathing, their bodies should fill with water, and likely sink. There's also the argument that fat floats. A corollary to a zombie would be a dead body, which I believe floats. There would then be a whole bunch of zombies floating, futily kicking their arms and legs in vain for eternity (or until they washed up on some beach). This begs the question, why would they go in the water in the first place? A zombies sole purpose is to eat human flesh and/or brains. There are neither flesh nor brains in the water. Land of the Dead fails to explain much of this underwater zombie phenomenon. I'm considering constructing a moat around my house.

...Thoughts?...