Vast majority of prey targetted by sharks are absolutely not aware of their presence. They are largely ambush predators. Unfortunately, they are the cats of the sea. There are exceptions but they have ambush on their minds, that's their ideal field of expertise.
Having said that, they still might monster and destroy their prey after their ambush strike, but sometimes they don't, and this is usually the case with their larger more impressive prey. This is where we get the ambush hit, big chomp, big hole... wait... prey bleeds out and gets weak and helpless, then finish. It's cool, don't get me wrong. We just usually don't allow for such long-term strategising used in AVA matchups. We don't say "well the wolf could just bite the puma in the thigh, then run away, then come back next tuesday after the infection has weakened the cat and then do it again, and then in april it could return and.." no we typically imagine basically a UFC fight where they have to really go at it, engaged in close quarter combat. Discussing some tactical military-esque chess match of wits might even be more in line with a likely reality, it's just not what we usually talk about.
In the contest we usually talk about the big ambush chomp and wait while the opponent bleeds out technique is essentially not on the table. So talking about the mass of the animals conquered with that technique and noting they're bigger better animals than what crocs take with their direct engaged grappling technique, is kind of glossing over the fact we are expecting a direct engaged grappling fight here.
I see it as very similar to noting a Komodo dragon can kill buffalo and then acting like this means the komodo dragon is at that level of direct engaged fighting prowess. Really conveniently ignoring it doesn't actually monster down buffalo with it's power and ability in engaged close quarter combat. It uses tactics and plays a prolonged chess game with the buffalo. Very cool, but doesn't translate to it's fighting ability in an ava scenario (actually it's not cool, in the komodo dragon's case IMO. I think it's weak and lame what they do, but beside the point).
Shark might be over croc anyway, I'm just saying the whale feats are not evidence of that, they have to be scratched. Any "hit and run and wait" feats do. Unless we change the contest.
"put a shark and a croc in a bay that is 3 square miles in size, with deep zones and shallow reefs and various caves and other forms of coverage, they have 48 hours to try and hunt eachother down and emerge victorious"
^ then, in this survivor style contest, absolutely. The Whale tail bloodletting feats are excellent evidence for the shark.\
Maybe we should have been doing contests like that all along, but no, we've been doing "pit fight" equivalent contests. Face to face, go at it fights.