I happened to tune in to a show called "Monster Quest" last week. The focus of the show was the Sea of Cortez and scientists looking for an unknown specie of shark. The locals have been seeing an animal that they call the "black devil", average length is 15-30 ft. Sightings go back a hundred years. The folks working on this think it may be a hybrid of Megladon.
Meg. was a deep water animal. There are some who think it could still exist in places like the Marianas Trench, or the Sea of Cortez. The SOC goes from food rich shallows to a depth of 12,000 ft.
There is a Meg. tooth in existence that has been aged at just a few thousand years. This would indicate that Meg. was around much later than first thought. Considering the vastness of the open ocean and the lack of knowledge of it's depths, it's possible that there are, if not Meg. itself, some close relatives hanging around out there.
What do you think?