Sweden · Åland · Finland · Estonia
Swedish Fish Farm deploys closed, drainable steel cages that take clean water from depth, control the biology like a land-based facility, and keep the cost base of sea farming. We are raising venture and family office capital alongside EU blue economy grant funding.
In short — why closed and nearshore wins
See the full comparisonStable, optimal water temperature and oxygen all year — no stalled weeks from heat, cold shocks, algae or lice handling. Shorter cycle to harvest weight.
Undisturbed fish keep converting, and flow control keeps pellets in front of them instead of dropping through a net. A lower feed conversion ratio on the largest cost line.
Sheltered sites minutes from the quay: grid power, daily access in any weather, no delousing campaigns, no wellboats, and a short chilled route to processing.
The challenge vs. the solution
Closed containment at sea is the only route that resolves the biology without carrying the capital burden of building an ocean on land.
The incumbent model, now capped by biology and public scrutiny.
Excellent control, but capital and permitting weigh it down.
RAS-grade control with the economics of the sea.
Environmental case
Nutrient discharge, escapes, sea lice, chemical treatments, dead seabed. All five are consequences of hanging a bag of mesh in open water. A closed steel wall does not mitigate them — it removes them.
Sludge, faeces and uneaten feed are captured and removed from the sea instead of settling on the seabed. Production grows without adding nitrogen or phosphorus to an already eutrophied Baltic.
A solid wall has no mesh to tear, so there are no escapes and no genetic dilution of wild Baltic and Nordic stocks.
Intake water comes from below the sea lice layer and is filtered, so we farm with zero delousing chemicals and zero pharmaceutical residue in the water.
The captured solids stream is routed to biogas or fertiliser, displacing fossil energy and mined phosphorus rather than polluting.
Nearshore advantage
Open pens must sit far out in exposed water so the sea can flush their waste away. A closed unit brings its own filtered water and keeps its own solids, so it belongs in sheltered water near shore — where conditions are stable, service is daily and the fish grow faster on less feed.
No dependence on strong offshore currents, so units can be moored in calm coastal water beside existing harbours and grid power.
Water is drawn from chosen depths and held in the optimal temperature and oxygen window, removing the weeks of stalled growth that heat, cold shocks, algae and low oxygen cost an open pen.
Undisturbed, never-deloused fish keep eating and converting, and flow control keeps pellets in front of them instead of falling through a net — a materially lower feed conversion ratio.
Minutes from the quay for feed, smolt, crews and harvest. Less fuel, fewer weather stops, quicker response to any alarm, and a short chilled route to processing.
Why now
Northern European seafood demand keeps climbing while regulators restrict open-net growth. Closed containment is the permit-ready capacity that fills the gap.