Kampachi Farms, a mariculture company in Hawaii, is devising a way to meet our insatiable desire for sushi with a farming method that has near zero environmental impact. By filling 100-ft. (30 m) copper-alloy mesh cages with fingerlings and letting them drift, tracked by GPS, in deepwater ocean, the company hopes to harvest thousands of tons of sustainable sashimi-grade kampachi. In 2011 it tested 20-ft. (6 m) pens 3 to 75 miles (5 to 120 km) off Hawaii. After six months, they yielded 10,000 lb. (4,500 kg) of kampachi, which grew twice as fast as expected.
Best Inventions of the Year 2012
Robots, rovers and the rest of 2012's most important innovations, from the affordable to the extreme
A Drifting Fish Farm
Price: $750,000 (estimated)
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$200 - $500