Send a textA fingernail‑sized invader is transforming Swiss lakes and the cost of clean water. In this episode, we track the quagga mussel from its arrival in the Rhine to its rapid spread through deep Swiss basins—stripping plankton, stressing fisheries, and clogging water infrastructure. Researchers from Eawag and the University of Konstanz explain the biology behind its takeover and what global case studies reveal about long‑term impacts. read more on this story on Quagga mussels  and science from SWI swissinfoJournalist: Julie HuntHost: Jo FahyAudio editor/video journalist: Michele AndinaDistribution and Marketing: Xin Zhang SWI swissinfo.ch is a public service media company based in Bern, Switzerland.