Illustration of closed farming pens at sea

Closed pen farming

Closed pen technology creates a controlled environment for salmon farming by using solid walls and pumped water from deeper, lice-free layers. This prevents escapes, reduces parasite pressure, and allows farmers to collect waste instead of releasing it into the sea. With stable oxygen and temperature conditions, fish welfare improves while environmental impact is minimized.

Farming in fully closed pens

Taking control of the environment

In recent years, we have seen several successful trials with fully closed containment systems in aquaculture. Although production costs are higher, this type of pen – or tank – offers significant advantages. The fish are effectively protected from sea lice, algae, and jellyfish, reducing the risk of welfare issues caused by external factors. Closed systems also provide greater control over key environmental parameters such as temperature and oxygen levels, ensuring more stable and predictable production conditions. As a result, this production method is a valuable complement to today’s open pens and may play a crucial role in meeting the future demands for sustainable aquaculture.

Why monitor fish in a closed environment?

Growth tracking and early detection

Closed pens give farmers greater control over the environment, but success still depends on having the right insights into the fish themselves. Continuous monitoring of weight, welfare, and behaviour – without manual handling or the stress it causes – enables farmers to track growth accurately, detect health challenges early, and understand how fish respond to feeding and the unique conditions in a closed system. By combining the insights provided by our automatic monitoring technology with the controlled environment of closed pens, farmers can optimize performance, safeguard welfare, and strengthen both biological outcomes and economic returns.