Fodor's Expert Review Lagoonarium
This enclosed part of the lagoon near Motu Ahi, off Afareaitu, is home to turtles, rays, and hundreds of fish. A boat takes visitors from Afareaitu at PK 9 (clockwise) on a very short transfer to the island where they can spend all day swimming, snorkeling, learning about marine life, and even nursing baby sharks. There is also an organized tour that includes a dolphin-spotting cruise followed by a few hours on the island. Ask your hotel concierge for tour details.