Source: The BBC 
May 22, 2012
"In the shallow waters of Gijon harbour, in northern Spain, a large, yellow fish cuts through the waves.
But this swimmer stands apart from the marine life that usually inhabits this port: there's no flesh and blood here, just carbon fibre and metal.
This is robo-fish - scientists' latest weapon in the war against pollution.
This sea-faring machine works autonomously to hunt down contamination in the water, feeding this information back to the shore."
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