The third major attraction on the North Coast. This is a natural, tidal lagoon formed by a wide wall of volcanic rock. The wall completely encloses the lagoon but at a depth of 15 feet it is pierced by a magnificent arch which allows divers to enter the sea from the lagoon - a particularly useful entry when the south east winds make shore dives impossible at other locations of the North Coast.

The wall is outside the lagoon and well down where an extensive range of colourful reef fish can be seen.

Photographers are attracted to the reef here in hopes of getting footage of the "Epinephelus Microdon" - called the curious cod but really a member of the grouper family. Unfortunately for the microdon it has absolutely no fear of humans and can often swim so close it becomes a nuisance. This has resulted in its almost total disappearance from the islands of the Pacific.

A common sight here, are small schools of red-orange squirrel fish which is a night hunter, but can be seen darting in and out of small crevices.