IMO, this point made on my above-referenced other forum settles the matter once and for all:
But this is a crododile we're talking about, not an alligator. He's used to duking it out with hippos. And they don't just "grab and drown", they grab and _roll over_ (see "death roll"). They spin around rapidly when they grab ahold and chew through their prey like a sawsall. Plus, in their territorial battles, they fight eachother in multiple dimenstions.
Who the fuck is a shark gonna fight? The occaisional pod of dolphins will come along and kick its ass with their mighty mighty brains; the occaisional orca or giant squid. But _most_ of their lives they're dumb eating machines with not much direct competition. And when they do fight with eachother, they learn how to fight other sharks. Crocs have been mixing it up all their lives. They know intimate combat with well armed and larger opponents, and they're extrordinarily sneaky.
Advantage: Croc.
I'm open to counterarguments, if there's anyone out there who still erroneously thinks the shark has a chance.