The Norwegian Institute of Marine Research has issued a warning to fish farmers in Sørlandet and Rogaland to be vigilant regarding changes in fish behavior, as a potentially harmful algae species known as "Pseudochattonella" is spreading westward along the southern coast. Researchers have developed a spread model indicating that the concentration of this algae is rising, which can lead to adverse effects on farmed fish.

Lars-Johan Naustvoll, a marine researcher, highlighted the importance of immediate reporting by fish farmers if they notice unusual behavior or increased mortality rates among their stock. The significance of this warning is underscored by the recent dramatic increase in the algae's density along the Skagerrak coast, which has now surpassed threshold levels known to cause fish deaths. This proliferation of "Pseudochattonella" could endanger the sustainability of aquaculture in the region if not managed promptly.

As the algae bloom progresses, its impact could extend beyond individual farms, potentially affecting local fish populations and the broader marine ecosystem. Stakeholders in the fish farming industry need to remain alert, execute preventive measures, and collaborate with researchers to mitigate the potential consequences of this environmental threat.