The Tuvaluan Dollar is the currency of Tuvalu - a small nation in the Pacific Ocean. Tuvalu has never had banknotes of its own, and has been issuing coins since 1976; these circulate together with coins of the Australian Dollar, which is also legal tender in the country, and to which the Tuvaluan Dollar is pegged.
The Australian Perth Mint issues a large variety of non-circulating legal tender coins under the authority of Tuvalu. Some of these are in the silver ounce format (abbreviated as 1 oz). Strictly speaking, they are not bullion as they are priced at a premium and are targeted at collectors who appreciate them for their artistic merit and collectable value and not just for their precious metal content.
The mint says about this coin:
Celebrating the popular television show SpongeBob SquarePants, this 1oz pure silver proof coloured coin is an appetising prospect for fans of the optimistic and enthusiastic yellow sea sponge.
In the underwater city of Bikini Bottom, SpongeBob SquarePants is the fry cook at fast food restaurant The Krusty Krab, where his life revolves around a wacky ensemble of marine characters - customers, co-workers, friends, and rivals. In this absurd world, where his home is a pineapple shared with a pet snail that meows like a cat, the animated chronicles of the optimistic and enthusiastic yellow sea sponge represent an undisguised celebration of innocent nonsense. | 
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