A robotic fish is seen in a tank at the London Aquarium in this October 6, 2005 handout photo made available March 20, 2009. Robot fish developed by British scientists are to be released into the sea off north Spain to detect pollution. The carp-shaped robots, costing 20,000 pounds ($29,000) apiece, mimic the movement of real fish and are equipped with chemical sensors to sniff out potentially hazardous pollutants, such as leaks from vessels or underwater pipelines. The robots to be used are bigger than those which were seen at the London Aquarium and they measure 1.5 metres (nearly 5 feet) long -- roughly the size of a seal. REUTERS/Jonas Borg/UPPA/Photoshot/Handout
http://inventorspot.com/articles/scientists_create_robotic_fish_aid_water_pollution_25636British scientists have designed a robotic fish that detects contamination in water.
The fish, which is about 1.5 meters (1.6 yards) long, will be released in the port of Gijón in Asturias, Spain. If the project is successful and the fish detects contaminated waters, it will then be used in rivers, lakes and seas all over the world.
The robotic fish looks like a normal carp and swims like one, but is much more expensive. This roughly $29,000 fish swims at a speed of about one meter per second. It contains chemical sensors which aid in finding dangerous pollutants such as leakage from boats or underwater pipelines. If the fish finds traces of contamination, it then sends the information wirelessly back to the control center.
This fish lasts about eight hours before it swims itself to a charging hub to refresh.
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http://www.youtube.com/watch?v=gSibkb6aKHM