As the other answers indicate, snapping turtle eggs and hatchlings have various predators.

I happened to see a show on discovery channel this week that mentioned that alligators jaws could easily handle a turtle shell, so I assume gators eat adult size turtles.

I found these comments on the internet:

In the northern sector of their range, many … Read more

I thought they were apex predators as adults, but all turtle hatchlings are subject to predation. I couldn`t recall if the Amazon had snappers. Just read that South America does, though. So probably.