An interesting article i found that i thought some of you might like to read.
BBC News - Robotic fish to patrol for pollution in harbours
"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."