The robotic fish technology could reduce the time it takes to detect a pollutant from weeks to just seconds, the scientists said. It could also aid underwater security, diver monitoring, and search and rescue efforts. The fish -- 5 feet long and costing about $31,600 each -- are designed to swim like real fish and have sensors to pick up pollutants. The project draws on expertise from the University of Essex and the University of Strathclyde in Britain; Ireland's Tyndall National Institute; and Thales Safare, part of Europe's largest defense electronics group.
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