Haraiki

Haraiki is a small uninhabited atoll, whose shape is triangular. A large pass at south of the atoll connects the lagoon to the open sea. However, a submarine ridge is upheaving to the north side of the pass, and the lagoon is divided.
In my scenery, the reef edge a part of the east side of the atoll collapses and it submerges into the open sea. This might be my mistake.