Syvash Bay, Salt water lagoon system in southeastern Ukraine
Syvash Bay is a shallow lagoon system along the northern coast of the Sea of Azov, separated from the open sea by the narrow Arabat Spit. The water rarely reaches deeper than three meters and forms a network of branching inlets and muddy shores.
The Red Army crossed Syvash in November 1920 during the Perekop-Chongar Operation to attack White Guard forces in Crimea. This breakthrough through the shallow water surprised the defenders and contributed to the end of the civil war in the region.
Locals call the waters Rotten Sea because of the strong smell produced by decaying algae and high salt concentrations. Fishermen and salt workers have learned over centuries to live with the extreme conditions and use the resources of the lagoon.
The area is accessible by local roads, with Krasnoperekopsk serving as a starting point for visits. The shoreline zones are often muddy and difficult to walk on, so travelers should wear sturdy footwear and prepare for rough terrain.
Micro-algae turn the water red or pink in certain seasons, depending on the salt concentration and water temperature. This coloration is especially visible in warm weather when the algae multiply rapidly and reflect the light.
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