Off Palm Beach, Miami, marine developer US Submarines is building a six-room habitat 30 m below, complete with cooking facilities, lounges and fish-feeding stations.
He said there were no guarantees about fish levels increasing, but he hoped the new facilities would encourage trawler owners to land their catch at Grimsby.
According to Aqua Bounty, the engineered salmon are all female, sterile, and raised in physically contained facilities, so the chance of the fish breeding in the wild is negligible.