Small Dark Spot
The Small Dark Spot, sometimes also called Dark Spot 2 or The Wizard's Eye, was a southern cyclonic storm on the planet Neptune. It was the second strongest storm on the planet in 1989, when Voyager 2 flew by the planet. When first discovered, it was  a dark cyclonic storm.  As Voyager 2 approached the planet, a bright core of cloud activity developed. It disappeared in 1994.