The Lined Sweetlips

This horizontal airmail issue completes the 1968 coral reef collection with a detailed biological rendering of a Lined Sweetlips (Plectorhinchus lineatus, historically documented here as Diagramma lineatus) navigating an underwater environment punctuated by rising water bubbles. Inscribed with the territorial reef designation "SOUMAHA", the masterfully engraved vignette captures the fish's prominent, fleshy lips and bold, longitudinal dark bands. Historically, this high-value stamp served the civil administration by validating premium transcontinental air routes while archiving the nocturnal, cave-dwelling fauna of the archipelago, illustrating the deep ecological links connecting the sheltered inner reefs of the Comoros to the broader evolutionary theater of the Indo-Pacific.