The Tongan archipelago consists of 176 islands, roughly the same number of marine species divers encounter in their first hour exploring the Kingdom’s coral reefs, caves and crystal clear waters. With sea turtles, manta rays, tuna, marlin and wahoo combining with even bigger creatures like whale sharks, Tonga is a destination with underwater thrills on a truly grand scale. Pristine coral gardens shimmer amid the ebb and flow of tropical currents, while spectacular coral reefs include amazing caves and arches. Tonga’s volcanic past, present and future are showcased in the unique underwater tunnels. Look forward to exploring some of the richest and most diverse ecosystems on the planet from June to November. Underwater exploration often comes with the living, breathing soundtrack of murmuring whalesong from courting humpback whales.