Amy Nordstrom, IEEE Spectrum, January 5, 2020–Inside a row of nondescript buildings in the small town of Albany, in northeast Indiana—approximately 1,000 kilometers from the nearest coast—Atlantic salmon are sloshing around in fiberglass tanks.

Only in the past five years has it become possible to raise thousands of healthy fish so far from the shoreline without contaminating millions of gallons of fresh water. A technology called recirculating aquaculture systems (RAS) now allows indoor aquaculture farms to recycle up to 99 percent of the water they use. And the newest generation of these systems will help one biotech company bring its unusual fish to U.S. customers for the first time this year.

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