This beautiful Republic of Congo 3 Franc stamp features the Elagatis bipinnulatus (Rainbow Runner), rendered in fine engraved detail. Issued as part of a marine fauna thematic series, it showcases three sleek, vibrantly shaded fish swimming in formation, with additional miniature species sketched in the background. The artwork by Cottet exemplifies classic mid-20th-century Congolese postal design, making it a standout piece for collectors of ichthyology, African wildlife, or engraved issues. A visually striking addition for any thematic or country collection.