In an artist's conception, a ghostly group of Oceanspheres floats semisubmerged in the open sea. Each 162-foot-wide (49-meter-wide) aluminum-and-Kevlar cage would be completely untethered to the ocean floor and self-powered by a system that converts the ocean's thermal energy to electricity.
If deployed, the cages will represent an advance toward more self-sustaining fish farms--another key to making distant, open ocean operations commercially viable.
A dozen Oceanspheres like these, deployed over less than half a square mile (1.25 square kilometers), are designed to potentially produce 24,000 tons of seafood, according to Hawaii Oceanic Technology
, which is developing the cages.
Illustration courtesy Hawaii Oceanic Technology, Inc.