Obyan Beach Reef, Saipan

Obyan Beach on Saipan's south coast sits inside a protected lagoon whose outer barrier reef is one of the healthiest coral ecosystems in the Mariana chain, with hard coral cover exceeding 60 percent and an extraordinary diversity of Acropora table corals, staghorn thickets, and massive Porites heads that have escaped the bleaching events that have reduced reef cover further south. The shallow reef crest at 3 to 8 m gives way to a gentle slope and then a wall that drops to 30 m, with encounters on every dive with sea turtles, Napoleon wrasse, and large schools of convict tang. Saipan's WWII history adds a layer of historical gravity — a Japanese Zero fighter aircraft wreck lies just off Obyan at 15 m depth, its wing and cockpit frame encrusted with coral and visible from the reef flat above.