A narrow entrance called The Narrows opens into a broad, sheltered basin, with steep, forested slopes plunging straight into the water. Under the surface is the real show: rock-wall communities and a thick freshwater “lid” that lets deepwater species survive unusually close to the surface. Expect rare red and stony corals, lampshells, tube worms, rock crabs, and shallow-water black coral. At The Narrows, look for the famed “strawberry fields”—dense congregations of strawberry holothurians (sea cucumbers). Seals, dolphins, and birdlife are part of the wider Fiordland picture, but this place is really about the marine world.