Fucking hell, I keep seeing this stupid post everywhere.
I believe those bottom two photos are spectacled caimans, and are one of the few (only?) crocodilians who adopt such a pose while at rest in the water.
American alligators do not do this, ever. Iโve observed a lot of alligators in the wild and up close (some of them up to 12 feet long) and Iโve never seen an alligator do this in my life. I donโt believe any crocodiles do this, either.
And second, the top photo is not even an animal of the same species as the bottom set of photos. I believe the top photo is of an American alligator, or perhaps of a Chinese caiman (though I suspect not).
People are gullible and blind, it seems.