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What happened
Sri Lanka recently witnessed a phenomenon dubbed 'fish rain,' where snakehead fish were found scattered across fields after heavy rainfall. Experts clarify that these fish likely migrated overland rather than falling from the sky, as they are capable of moving across land during wet conditions. Such migrations are crucial for the survival of many freshwater species, linking various aquatic habitats. However, the construction of dams and barriers in Sri Lanka is disrupting these ancient migration routes, threatening biodiversity. Fish ladders are proposed solutions, but they are rarely implemented. This situation highlights the need for better management of aquatic ecosystems to ensure the survival of these species.
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Key insights
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Fish migration importance
Fish migrations are vital for ecosystem health and species survival.
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2
Dams disrupt habitats
Rising dams fragment rivers, blocking essential fish migration routes.
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Fish ladders rarely built
Proposed fish ladders to aid migration are often not constructed.
Takeaways
The phenomenon of 'fish rain' in Sri Lanka serves as a reminder of the intricate connections within aquatic ecosystems and the urgent need to address barriers that hinder fish migrations. Protecting these natural movements is essential for maintaining biodiversity and ecosystem health.