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They're a mix between a reindeer, an Inuit Indian, and an Emperor Penguin.

It isn't known what the Anouki were before Spirit Tracks. It is possble that they evolved from something else, since Spirit Tracks is quite far along in the Timeline, and they do not appear in any other game, then again, they could have simply been natives of the continent that eventually becomes, "New Hyrule". Timelinesplitter 04:37, May 19, 2012 (UTC)