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50 Dollars - Elizabeth II Heaviside's Dolphins
| Issuer | Cook Islands |
|---|---|
| Year | 1990 |
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| Composition | Log in to see details |
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| Shape | Round |
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| Obverse description | Log in to see details |
|---|---|
| Obverse script | Latin |
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| Reverse lettering | ENDANGERED WORLD WILDLIFE 50 DOLLARS |
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| Additional information |
Oliver Heaviside's dolphin — Cephalorhynchus heavisidii — was named not for the Victorian mathematician Oliver Heaviside, as is commonly assumed, but for a Captain Haviside (note the spelling discrepancy) who reportedly brought a specimen to the Natural History Museum in the early 19th century. The attribution to the wrong Heaviside has never been formally corrected.
Cook Islands issued dozens of wildlife-themed silver commemoratives in this period under licensing arrangements that had little to do with local fauna or commerce — these coins were designed entirely for the collector market and saw no domestic circulation.