Fish farms....

[chicot60]

Diamond-shaped fish cages rise from the water for cleaning at Open Blue, the world’s largest open-ocean fish farm, eight miles off the Caribbean coast of Panama. The divers on top pumped compressed air into the hollow central spars to raise the cages. Offshore farms could open a new food frontier. (http://i.imgur.com/vv7wpYL.jpg)

http://i.imgur.com/vv7wpYL.jpg