About Us

At Subfarm we are passionate about bringing the salmon back to its natural habitat – the fresh, crisp and roaring ocean.

We are setting a new standard for open ocean aquaculture, fish welfare and sustainability.

The management team and the board of directors at SubFarm have extensive managerial and technical experience from industrial development, and have a proven track record from entrepreneurial business and finance.


The Current Challenges in Salmon Farming

The Technology

Single point moored, winch operated, submerged cage technology.

Optimal Temperature

Keeps the salmon at the optimal temperature level and ocean conditions, away from sea lice and toxic algae.

Easy Operations

Allows fish transfer and harvesting operations in rough weather conditions, without surfacing the cage.


Easy to disconnect for maintenance of cage on-shore. Cage structural elements built and assembled locally. Scalable development to reduce risk.


Areas of Application

The advantage of using a submersible cage compared to traditional floating frames is to significantly decrease the risk of biomass loss and, consequently, the potential for high economic loss. Furthermore, recent factual evidence on sea-lice attack protection and algae blooms points to prevention with a deeper net installation. This extends the application of submersible cages.

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Existing Farms

Avoid exposure to sea lice and toxic algaes by free positioning of cage in the water column. No need for surfacing of cage during fish load-out.

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Exposed Areas

Expansion of production into more exposed areas within existing production regions. No need for large, complex steel structures.

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Open Ocean

Open new production regions offshore with favourable sub-surface temperatures and close to the consumer markets.

Co-locating with offshore wind

Combination-farming improves spatial use and reduces areal conflicts. SubFarm’s distributed cage system allows for integrated aquaculture farms inside perimeter of offshore wind farms.


Management Team

Karl Stromsen

Founder & CoB

PhD Hydrodynamics, 25 years + in O&G, energy and aquaculture industries (incl Lerøy, since 2012). Serial entrepreneur, including with exit to PE fund. Main career in Europe and UK, managed several EU funded R&D and Innovation projects. Short period in the Norwegian Government with Innovation and export on cleantech and energy

Paal Hylin

Founder & CEO

MSc, Industrial Economics, Norway, Master of Energy Economics , IFP Paris 25 years + in O&G industry holding CEO, COO positions in 250 mill USD turnover companies with 600+ employees, 5 years as entrepreneur and founder of start-up within maritime and aquaculture industries

Morten Jantzen Lyssand

Founder & CTO

MSc, Nautical Science, Norway. 20 years in O&G, risk management and aquaculture industries. Head of Global Maritime, Oslo, developing company’s aquaculture branch. Specialist within marine operations, project and risk management

Brit Hjeltness

Scientific Advisor

Dr. Scient Fish Vaccinology and Bacteriology, Former Deputy Director of Fish and Shellfish at the Norwegian Veterinary Institute (NVI) and Research Director in Fish Health at Institute of Marine Research (IMR). Professor in fish health at University of Tromsø and having taught fish health at University of Bergen, University of Dacca, Bangladesh and University of Nha Thrang, Vietnam

Active Shareholders

Freddy Knutsen

Owner, RTS

Odd Kare Oygarden

Owner, RTS

Gunnar Carlson
Owner, Sea Technology

Reach Our Team

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