When on a tour to Saona Island or when snorkeling at your hotel, please do not remove the starfish from the water. They can survive only 10 seconds out of the water, but if you see how many people travel from the Bayahibe Cove to Saona Island in a day, imagine if half or even a quarter of them do it and the damage that is being caused. You can see them fine if you keep them just below the surface and take yourself down to their level. Just because they don't scream or squirm doesn't meant that they aren't uncomfortable.
The water is crystal clear, so we don't actually even need to pick them up at all. You can see that in this picture which is taken from the boat: …webshots.com/photo/2637688010064234328YlDjOI If the reason that you are taking a picture of yourself with a starfish is because it's cool to see that form of wildlife up close and personal, please give it the opportunity at a good long life that should be the case living in that Caribbean paradise! Some people say that the starfish are planted there (not) and plastic because they're hard and unfamiliar feeling (not), but they are truly a living being and should be respected as that.
Just something to think about. I was spending some time this evening looking at various pictures on the internet and found myself becoming angry seeing how many shots there were of people putting them on their heads and holding them out of the water and smiling.