Shrimp, one of the world's most valuable farmed seafood, is produced in massive volumes by a relatively small group of countries.

But new interest in locally grown food, spurred on by the collapse in the global supply chain amid the COVID-19 pandemic and a move toward a more sustainable "circular economy," are giving smaller recirculating aquaculture systems (RAS) a major boost.

Primarily, that boost has come in the salmon farming sector, where upwards of 100 RAS or so-called "flow-through" projects (where seawater is brought into the systems) have been launched.