Issued by the USSR (Union of Soviet Socialist Republics) in 1990, this stamp commemorates international scientific cooperation in Antarctica, highlighting marine research in polar ecosystems. The design features Antarctic krill, a vital species forming the foundation of the Southern Ocean food chain. Symbolizing joint Soviet–Australian scientific collaboration, the issue reflects late Cold War-era environmental and research diplomacy. Polar exploration and marine biology themes make this stamp highly desirable among Antarctic and science topical collectors. Its detailed oceanic artwork and historical research context enhance its philatelic significance.