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From Wikidweb

Kelpie

Description: The kelpie is a supernatural shape-shifting water horse from Celtic folklore that is believed to haunt the rivers and lochs of Scotland and Ireland. In Orkney a similar creature was called the Nuggle, and in Shetland a similar creature was called the Shoopiltee. It also appears in Scandinavian_folklore where it in Sweden is known by the name Bäckahästen, the brook horse. In Norway it is called nøkken, where the horse shape is often used, but is not its true form.
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