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NASA - The National Aeronautics and Space Administration

08/03/2026 | Press release | Distributed by Public on 08/03/2026 11:37

Guinea-Bissau Tidal Waters

NASA/Lauren Dauphin, USGS

Twice each day, tides ebb and flow through a maze of sandy channels, mudflats, and mangrove forests that flank the 88 islands and islets of Guinea-Bissau's Bijagós Archipelago (Arquipélago dos Bijagós in Portuguese). Seen from above in this image from Nov. 28, 2025, the process leads to stark changes to the landscape: around low tide, intertidal mudflats and sandflats emerge from the sea, causing islands to grow significantly before shrinking again hours later.

Learn more about the region and its wildlife.

Text credit: Adam Voiland

Image credit: NASA/Lauren Dauphin, USGS

NASA - The National Aeronautics and Space Administration published this content on August 03, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on August 03, 2026 at 17:37 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]

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