Robot Fish To Hunt Down Pollution

An anonymous reader writes "According to the Financial Times, scientists are building a shoal of robot fish to be let loose in the port [of Gijon, Spain] to check on the quality of the water. The fish are equipped with tiny chemical sensors capable of detecting pollutants in the water. These let them home in on the sources of hazardous pollutants, such as leaks from vessels or undersea pipelines. Modeled on carp and costing about £20,000 ($29,000) each to make, the fish are to be lifelike in appearance and swimming behavior so they will not alarm their fellow marine inhabitants."