Farmed Salmon Lumpfish Welfare | Animal Welfare Hub

Lumpfish are used as cleaner fish in salmon aquaculture to control sea lice, but their own welfare is often overlooked. As their use has expanded, welfare concerns about lumpfish have grown substantially.

Key Facts

Lumpfish are deployed in salmon pens to eat sea lice, reducing the need for chemical treatments
Mortality rates for lumpfish in salmon pens can exceed 30-50% within a production cycle
Lumpfish stop eating sea lice when they have access to salmon pellets, reducing their welfare function
They are often raised in very high-density hatcheries with poor welfare standards before deployment
Lumpfish have pain receptors and stress responses consistent with the capacity for suffering

Welfare Considerations

Lumpfish introduced as a welfare solution for salmon often experience severe welfare harms themselves. High mortality from salmon pen conditions, being eaten by salmon, and inadequate species-specific husbandry make lumpfish one of the most poorly treated animals in commercial aquaculture. Their welfare needs are just beginning to be studied. Using lumpfish without addressing their own welfare simply shifts suffering from salmon to lumpfish. Cleaner fish welfare standards are now being developed by leading certifying bodies but implementation remains poor.

What You Can Do

Support aquaculture certifications that include cleaner fish welfare standards alongside salmon welfare
Advocate for species-specific research on lumpfish pain, stress, and behavioral needs
Choose salmon products from producers who report and monitor cleaner fish mortality rates
Donate to research developing sea lice controls that do not require cleaner fish deployment