Bligh Water & Vatu-i-Ra

Almost none of this is near land, and that shapes the whole trip. Liveaboards out of Viti Levu spend their nights on or near the seamounts and run several dives a day off tenders, which is what lets them time each mount to the water rather than to a departure slot. Day boats from the north coast treat it as a crossing instead, heading out for two or three dives and back before the afternoon wind gets up, and a rough forecast keeps them on the closer sheltered reefs rather than out in the channel.

The sites are underwater mountains rather than fringing reef, and that changes how you dive them. Tenders drop you upcurrent of a summit, you descend into blue until the pinnacle resolves below you, then work down one flank and back up the other. The shallowest tops come close enough to the surface that the end of the dive and the safety stop happen inside the cloud of small fish above the summit. The passage bommies closer to shore are shallower, more sheltered and far more forgiving.

The soft coral is a tidal display rather than a fixed backdrop, and that governs what gets dived when: the colonies sit slack and drab in still water and inflate into full colour once the current runs, since they are feeding rather than posing. Guides build the running order around the exchange, so the site list can change at breakfast. The same pinnacle can look like two different sites on the ebb and on the flood, which is why wide-angle photographers want the moving water.

It rewards buoyancy far more than depth, since most of the colour sits in the shallows on top of each mount and time spent deep buys less. Newer divers do fine on the sheltered passage bommies, but a week of exposed pinnacles in open water is not where early experience is best built. Come for reef structure and colour: sharks, jacks and the occasional manta turn up, but they are a bonus rather than the reason to make the crossing.