How do we know the megalodon is extinct if we explored less than 5% of the ocean?

Question

How do we know the megalodon is extinct if we explored less than 5% of the ocean?

In: 2002

Answer 1

Because superpredators aren’t stealthy, footprint-wise.

A fish the size of megalodon requires a LOT of food. It would have to live somewhere that sustains large prey and/or migrate to follow whale migrations. If nothing else, we’d be able to tell from the way whale pods behaved that there was something bigger than orcas out there hunting them.