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Which moon is the largest of Neptune’s moons?

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Clouds in Neptune's atmosphere — Neptune A photograph of clouds in Neptune's atmosphere, taken by Voyager 2 in August 1989. The view is from below the planet's equator, and north is up. The Great Dark Spot (center left) is 13,000 km (8,100 miles)—about the diameter of Earth—in its longer dimension. Accompanying it are bright, wispy clouds thought to comprise methane ice crystals. At higher southern latitudes lies a smaller, eye-shaped dark spot with a light core (bottom left). Just above that spot is a bright cloud dubbed Scooter. Each of these cloud features was seen to travel eastward but at a different rate, the Great Dark Spot moving the slowest.

The largest of Neptune’s moons is Triton.12

Discovered in 1846, Triton is significantly larger than the planet's other satellites, with a diameter of approximately 2,706.8 km. It is unique among the large moons in the solar system for its retrograde orbit—meaning it orbits in the opposite direction of Neptune’s rotation—and it is widely believed to be a captured object from the Kuiper belt.12