Orca vs Great White

[Jackalope]

It wasn't fresh blood, I'm trying to remember this off the top of my head but it was a chemical produced associated with panic (that the sharks in the small study seemed to interpret as panic even when they weren't the source - sensitive noses and all).

@Shell, likely...much larger and more terrible shit...lol. Think theres a debate as to whether Great whites come from the Megalodon (huge -but still not the biggest thing swimming) or Mako (small-and back in the day, equivalent to a goldfish) lineage.

Rhythm - I beleive the controversy is whether or not Megalodon belongs to Lamnidae (mackerel sharks, along with great whites and makos) or Otodontide (an extinct family), not which family GW belongs to. You may have material I'm not familiar with, however.

Regardless of that, for most of it's existence, GW was not the biggest, baddest predator in the sea.

Perhaps it is the case that large macro-predators avoid each other's territory to reduce competition. As GW and Orca share similar dietary preferences, it may simply be a case of pressure on food supply than fear of predation.

ETA: To give an idea of the difference in size between GW and Megalodon, see below (the two smaller teeth are from GW, the larger from Megalodon). GW would have been a tasty snack.