Shark Bay, Australia – a UNESCO World Heritage Site on the western edge of the continent – is known for its vast seagrass meadows, rich marine life, and the remarkable stromatolites that represent some of the oldest life forms on Earth. These features, combined with the area’s contrasting land and marine environments, make Shark Bay an important location for understanding ecological processes and geological evolution.
Shark Bay’s waters, islands and peninsulas cover about 2.2 million hectares, around 70% of which are marine. The region contains one of the world’s largest and most diverse seagrass beds, including the Wooramel Seagrass Bank. The area’s hydrologic structure, shaped by the Faure Sill and high evaporation rates, has created hypersaline zones such as Hamelin Pool, where diverse and abundant stromatolites flourish. These living microbial structures are comparable to counterparts that dominated marine ecosystems more than 3,000 million years ago.
This Copernicus Sentinel-2 image, acquired on 26 November 2025, captures the shallow sandbanks, extensive seagrass meadows and hypersaline basins of Shark Bay in high resolution, along with its arid surroundings near Denham. The contrasting colours illustrate the region’s complex coastal systems and help reveal the biological and geological patterns that define the bay.
Shark Bay is also a sanctuary for threatened species. Its seagrass beds support around 11,000 dugongs, while sheltered coves provide nesting areas for Green and Loggerhead Turtles. The region hosts unique mammal species, including the Burrowing Bettong and Western Barred Bandicoot, and attracts migrating Humpback and Southern Right Whales. Dolphins, sharks, rays and numerous fish species are also common across its three biotic zones, shaped by steep gradients in salinity.
Copernicus’ free and open data allows continuous monitoring of these sensitive ecosystems, supporting conservation efforts that address pressures from tourism, coastal development and climate change. Long-term management frameworks – guided by Australian federal and state legislation – help safeguard Shark Bay’s natural values, ensuring that its landscapes, marine habitats and ancient life forms remain protected for future generations.
Featured image credit: European Union, Copernicus Sentinel-2 imagery
