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50 Colones Marine crab, colorized
| Issuer | Banco Central de Costa Rica |
|---|---|
| Year | 2023 |
| Type | Non-circulating coin |
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| Obverse description | The obverse features the large denomination numeral '50' prominently displayed in the center field, with the word 'COLONES' inscribed beneath in a bold sans-serif typeface. The outer legend 'REPÚBLICA DE COSTA RICA' arcs along the upper periphery in large raised letters, while the secondary legend 'BANCO CENTRAL DE COSTA RICA' is inscribed in smaller lettering just within the inner border, below the main legend. The design is framed by a raised rim with interrupted reeding elements visible at the lower portion of the border, and two small circular embellishments flank the denomination at the mid-field level. The overall composition is clean and geometric, consistent with the standard circulating 50 Colones coin design. |
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| Reverse description | The reverse presents a vivid full-color acrylic-applied depiction of the marine mangrove crab Goniopsis pulchra rendered in naturalistic detail at center, its carapace shown in deep blue-black with white spotting, and its eight walking legs and two prominent chelae (claws) displaying a striking yellow-and-black mottled pattern with orange-red highlights on the upper chelae. The background field features a subtly textured, low-relief rendering suggestive of a tidal mudflat or mangrove shoreline, incorporating a stylized silhouette map of Costa Rica. The legend 'MANGLAR' is inscribed in incuse capital letters along the upper arc, with the date '2023' positioned vertically along the left inner field. The species names 'Cangrejo marinera' and 'Goniopsis pulchra' are inscribed in italic script in the lower field, identifying the subject with scientific precision. |
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| Additional information |
Costa Rica's 50 colones denomination has been in continuous circulation since 1994, but the colorized marine crab issue represents part of a broader wildlife conservation series the Banco Central launched to raise public awareness of coastal biodiversity. The acrylic color application is applied post-strike, a process increasingly adopted by smaller central banks seeking differentiation without the cost of bimetallic tooling.
The Caribbean and Pacific coasts of Costa Rica host over 100 documented crab species, several under active conservation pressure from coastal development.