It had a Great Dark Spot, which was a big storm, but it disappeared. A smaller one has shown up since.
its big and awsome and blue
Yes, Neptune does have rings, as to other uniquefeatures, Neptune is an almost exact twin of Uranus. (There are differences in size, and a few other characteristics not worth noting).
Neptune has rings and is magnetic. Yes, but that isn't unique.
Uranus and Neptune are called the sister planets
aliens did that
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its blue
it has no characteristics of any kind
aliens did that
gas
Neptune was the first planet found by mathematical prediction rather than by empirical.
Something unique about it is its temperature its -218 Celsius. It's very beautiful... calming