No whirlpools that i have ever seen. Not much current in this one either because of its location on the ocean. Its pretty merky thought, hard to see. the whirlpool factor may be greater the farther you get away from the sea yes, but i am not sure. I know that there are 2 right near where I live and people dive them all the time.
The blue hole in the picture is really interesting though because it goes straight down and all you can see is black. I'd love to take a depth sounder over it and see how deep it is..
