Diving in Raja Ampat

Raja Ampat sits at the dead centre of the Coral Triangle, off the far western tip of Papua, and the biodiversity figures attached to it are not marketing: this is the most species-rich marine environment ever measured, with more kinds of coral on a single reef than exist in the whole Caribbean. Diving here is diving at the source.

The best of it is only reachable by boat, which is why most trips are liveaboards — a week or more moving between reefs, manta cleaning stations and walls of fish dense enough to dim the light. Between dives you are looking out at limestone islets and empty turquoise lagoons that would be a destination in their own right anywhere else.

The currents that feed all this life are strong, so most operators want advanced certification and logged experience. A marine-park entry permit is required and sold locally. The prime window runs through the northern winter, roughly October to April, when the mantas gather.

Diving at the source: Raja Ampat holds the most species-rich reefs ever measured, with more coral on one reef than in the whole Caribbean.

The best sites are boat-only, so most trips are liveaboards — a week or more moving between reefs, manta cleaning stations and walls of fish dense enough to dim the light. Between dives you look out on limestone islets and empty turquoise lagoons that would headline anywhere else.

The currents that feed all this life are strong, sometimes ripping, which is why this is diving for the experienced rather than a place to learn. Manta season peaks through the northern winter.

Book a liveaboard well ahead, since the best reefs are only reachable by boat and berths for the prime northern-winter window, roughly October to April, sell out far in advance. A marine-park entry permit is required and sold locally; your operator will usually help arrange it.

Most operators want advanced certification and logged experience because of the strong currents, so build up your dive count and, ideally, take a current or drift course first. Reach it via Sorong in West Papua, the jumping-off port for the archipelago. Come for the manta aggregations from December to March.