5 Dollars - Elizabeth II Yellowfin Tuna

Tokelau has no mint of its own and no indigenous coinage tradition — these issues are struck under New Zealand's administrative oversight, with the New Zealand Mint producing collector pieces marketed almost entirely to overseas buyers. The territory's three atolls have a combined land area of roughly 12 square kilometers and a population that has never exceeded 1,500, making "circulation" a largely theoretical concept.

At 0.5 grams, this sits at the lower practical boundary of struck gold coinage.