Salvinia molesta can double its biomass in 36 hours. It spreads across ponds, lakes and slow-moving waterways in a smothering green mat, blocking sunlight, consuming oxygen and collapsing the ecosystems beneath it. Now present in freshwater bodies across more than 60 countries, it ranks among t...

Source: [Phys.org](https://phys.org/news/2026-06-invasive-fern-science-misidentified-decades.html)

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