August 18, 2009--Thousands of cobia swirl around the center of a traditional deepwater fish-farming, or aquaculture, cage off Puerto Rico in 2007.

In the future, fish-farming cages may become mobile, robotically roaming the oceans under their own propeller power, mimicking the movements of wild schools, experts say. The result could be greener, tastier seafood. (Read full story.)

Little known until recently, the cobia has become an aquaculture superstar in Latin America and the Caribbean. Diners find the fish delicious, while fish farmers appreciate its ability to grow up to ten times faster than most other species.

At this facility, fingerlings from onshore hatcheries are raised to adulthood in clean, deep ocean waters.