Closed-containment salmon farming enterprises in Canada seemingly stand to gain from a vow by Canadian PM Justin Trudeau's Liberal party to close ocean netpen salmon farms by 2025 if he wins this month's election. But will they? Not everyone is quite so sure.

Garry Ullstrom, a partner in BC Land Aqua Ventures and CEO of First Nation-owned Kuterra, has been focusing on proving the technology and getting the government to support and enable it to become a first mover in...