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.
Here in Spain, several are undergoing their first trials to see if they make the grade as future marine police.
via BBC
