This is a must see attraction. Sam and the gang are pretty comical which makes it that much more enjoyable. Basically, they take you shark feeding, snorkeling at the coral gardens, and then the Lagoonarium. The Lagoonarium is a beach on a motu that has been fenced off, including the water. They have different pools with different fish in each one. So it's just like swimming in an aquarium.
We spent all of our time in the shark pool trying to get photos of them. The problem is that they didn't want to come near us. We had to chase them to get a picture!
The whole time we were there, Sam video taped everything with his camera. We purchased the 30 min tape at the end of your trip and they delivered it to our hotel.