Net gains
Open-ocean fish farming is becoming easier
AN UNUSUAL object arrived off the coast of Norway last September. Roughly the weight of the Eiffel Tower and enclosing a volume greater than St Peter’s Basilica in Rome, its polyhedral frame measures 68 metres from top to bottom and over 100 metres in diameter. Parked 5km offshore, it looks like a partly submerged bright-yellow Ferris wheel tipped on its side, with a white control tower at its hub. Locals took it for a flying saucer as it passed South Africa on its way from the shipyard in China where it was built. (The picture shows it before it was submerged.) Yet to come are its occupants: 1.5m baby salmon.
This article appeared in the Technology Quarterly section of the print edition under the headline “Net gains”
From the March 10th 2018 edition
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