Niue, a sovereign state in free association with New Zealand, uses two official legal tender currencies. The New Zealand Dollar is the circulation currency for daily transactions, while the government also authorises legal tender coins in the Niue Dollar currency for collector's purposes.
A number of mints issue a large variety of commemorative, bullion and collector coins under the authority of Niue. These coins are dedicated to historical or general popular culture themes not related to Niue itself.
Some coins are marketed in standard bullion sizes, like half ounce silver, one ounce silver etc, and some of those are also denominated as $1, for which see respective lists. This coin, denominated as One Niue Dollar, is not in a standard ounce-based size and is made using a "smartminting" technique - meaning that it has features not generally found in circulation coins.
This coin is part of the Endangered Animal Species series and features Grevy's Zebra.
The Mint says about it:
"The Mint of Poland presents this coin of the "Endangered Animal Species", designed to draw attention to preservation and protection of the Grevy's zebra, being the world's largest species of the zebra.
What focuses attention is its out-of-ordinary packaging, presenting outlines of animals that are the themes in the series with an emphasised silhouette of a Grevy's zebra, designed specifically to house this coin." | 
Search for Niue: One Dollar Silver 2014 Grevy's Zebra on eBay 
