50 Dollars - Elizabeth II European Otters

Cook Islands ran an extensive wildlife conservation series through the late 1980s and early 1990s, contracting production to foreign mints and selling primarily to the collector market — these pieces were never intended for circulation on the islands themselves. The European Otter (*Lutra lutra*) was a logical subject: by 1991 it had been extirpated from much of its historic range across Europe due to pesticide contamination of waterways, particularly organochlorine compounds accumulating through the food chain.

KM#118 is one of several large-format silver issues from this Cook Islands fauna run that shares the same 19.4g specification across different denominations, suggesting batch production planning rather than denomination-specific design.