I definitely agree with you, other than the fact that the third seems to be an Olive Ridley.These are your species:
1,2, and 4 are Hawksbill Sea Turtles, Eretmochelys imbricata.
#3 is a Green Sea Turtle, Chelonia mydas.
Super cool experiences, good for you!
Yeah your right, I originally though that the head seemed to be too round and large proportional to the body. But, If you look closely, there are also 4 post-orbital scutes that are right below the eye that run back a little bit. This is a trait only shown in green sea turtles.It's much too big to be an Olive Ridley, and the serrated beak is a diagnostic characteristic for Greens.
You could put them here. It's just as easy to create a new thread though and attach the pics there, too.No idea on any ID. But they are awesome and all those places sound like an awesome place to go to.
Can I post pictures of the ones I saw in Hawaii for ID? Or would that be 'stealing the thread'?