They open to check people in at 8am, we were there at 8.05am and must have been about 70 in front of us. If you arrive early you are allocated an early dolphin swim and you have the rest of the day to expore.
It is a fantastic day, but of course the dolphin swim is not long enough, but whatever the time was it still wouldn`t be long enough.
Swimming and snorkling with the stingrays is also loads of fun, they even let you feed them.
We stayed till 5pm and didn`t want to leave, but the black clouds dictated that we had to.
If you decide to buy photo`s etc, try and pick them up during the day, don`t leave it until you are going as everyone also gets their photo`s then and the queues are rather long.
Have a wonderful time.