Lumpfish: Welfare in Salmon Lice Control Use

Key Welfare Facts

Lumpfish are deployed in salmon cages to consume sea lice, substituting for chemical treatments in many operations.
They face significant welfare challenges including aggression from salmon, inappropriate water temperature, and disease.
Lumpfish mortality rates in commercial operations are often extremely high, sometimes exceeding 90% per cycle.
Species-specific requirements including substrate, refuges, and appropriate stocking rates are frequently unmet.
Welfare assessment tools for lumpfish are underdeveloped compared to salmonids, reflecting their lower perceived value.
Recent regulatory changes in Norway and Scotland require minimum welfare standards for cleaner fish deployment.

Welfare Assessment

Lumpfish welfare is a significant but often overlooked component of salmon aquaculture. Improvements in tank design, density limits, and feed quality are needed urgently. Consumer pressure for certified high-welfare salmon production drives welfare improvements.

What You Can Do

Support aquaculture certification schemes covering cleaner fish welfare
Ask retailers about cleaner fish welfare standards in salmon production
Advocate for regulatory standards governing lumpfish stocking and management
Support research into less invasive sea lice control alternatives