Lagon Bleu, Natural lagoon within Rangiroa Atoll, French Polynesia

Lagon Bleu is a shallow, enclosed lagoon within Rangiroa Atoll where the water displays multiple shades of blue depending on depth and light. Small coral islands surround the water and protect it from the open ocean's waves and currents.

The local Paumotu people have called this place Motu Ta'aeo for generations, maintaining their historical connection to the land through traditional practices. This name and the family-based management reflect a long tradition of stewardship in the region.

In Paumotu the site is called Motu Ta'aeo. Day trips are run by a few Polynesian families who own the surrounding motu; lunch is usually raw fish in coconut milk, followed by feeding juvenile blacktip reef sharks and gulls with the leftovers. The families have refused large-scale tourist development.

The only activity offered is a day trip with a picnic organized by a few Polynesian families. Access is by boat, and the families who own the motu have always refused massive tourist exploitation. The organizers are careful about waste and protect the site.

The shallow water serves as a nursery ground for juvenile blacktip reef sharks, which grow safely away from larger ocean predators in this enclosed space. Visitors can watch these young sharks without aggression, providing a rare window into how this shark species develops in the wild.