Robot Fish To Hunt Down Pollution

04/19/2009 05:12 am ET | Updated May 25, 2011

Something fishy is going on in northern Spain. The waters of the port of Gijon are shortly to be invaded -- by robots.

Scientists are building a shoal of robot fish to be let loose in the port to check on the quality of the water. Modelled on carp and costing about £20,000 ($29,000) each to make, the fish are to be lifelike in appearance and swimming behaviour so they will not alarm their fellow marine inhabitants.

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