The Caves (Maupiti) – Maupiti (Society Islands)

30m Max

10-25m Vis

boat

Site Overview

The Caves off Maupiti's outer reef offer a fascinating underground diving experience featuring limestone overhangs and cavern formations that have been sculpted by millions of years of geological processes in the volcanic and coral rock substrate of this remote island. The cave system consists of several interconnected chambers and swim-through passages that vary in size from small overhangs to spacious caverns where divers can comfortably observe the unique ecosystem that has developed in the twilight zone between full light and complete darkness. Massive schools of glassfish fill the cave interiors with their translucent bodies catching the light from your torch in spectacular displays of bioluminescence and refraction that create some of the most dramatic underwater photography opportunities available anywhere in French Polynesia. Lobsters of various species inhabit the darker recesses of the cave system, their long antennae extending into the water column to detect vibrations from potential prey and predators in the low-light environment. Moray eels of multiple species occupy favoured crevices throughout the cave walls, with some individuals growing to impressive sizes in this protected environment where food sources are concentrated by the cave geometry. The cave walls themselves are decorated with colourful sponges, tunicates, and bryozoans that thrive in the reduced light conditions, creating living tapestries of orange, yellow, and purple that contrast beautifully with the dark rock substrate.

Dive Briefing

"Descend from the boat to the outer reef slope where the cave entrances are visible as dark openings in the limestone rock face. Your guide will lead the group into the first cavern where your torch light reveals the spectacular school of glassfish that fills the chamber with thousands of translucent bodies. Move slowly and deliberately through the cave system to avoid stirring up sediment that can reduce visibility and disturb the delicate cave ecosystem. Lobsters are abundant in the darker recesses, their long antennae and compound eyes adapted to the low-light environment of the cave interior. Moray eels occupy their favourite crevices throughout the cave walls, with some large specimens extending their heads to investigate the torch light with apparent curiosity. The cave walls are covered in colourful filter-feeding organisms that create spectacular photographic subjects when illuminated by your torch beam. Your guide will choose which cave chambers to explore based on the group's comfort level and the conditions inside the formations. Exit the caves and ascend along the outer reef slope, enjoying the coral communities in the sunlight before completing your safety stop."