A couple of years ago I thought this was a little weird. Now it’s something that just happens and sometimes you take a gator shot, others time no.
Above you can see the trunk of a tree on the right side. At times the small / mid size Alligators swim up to the bank and float, looking up, and watching.
All I can think of is they are curious, in their own way. Also, when you eventually walk away they don’t move at all. It’s like they forgot all about you. Short attention span, tiny brain.