Aquaculture

Clarias Catfish Welfare in African and Asian Aquaculture

Welfare overview for Clarias catfish -- air-breathing catfish farmed extensively in Africa and Asia.

Key Facts

Clarias gariepinus and related species are farmed extensively in Nigeria, Indonesia, Egypt, and other tropical countries
They are obligate air-breathers -- access to the water surface is an essential welfare requirement
Clarias tolerate low oxygen levels better than most farmed fish but can still suffer in poor conditions
They show aggressive feeding behaviour -- dominant animals may outcompete and injure subordinates at high density
Clarias are farmed in ponds, tanks, and increasingly in recirculating aquaculture systems in Europe
Electrical stunning before slaughter is the most welfare-appropriate method -- increasingly adopted in European farms
They are often killed by asphyxiation or ice-water immersion in tropical production systems
2025 welfare standards are developing faster in European than tropical production

Welfare Significance

Clarias catfish welfare requires attention to their specific biology -- particularly their need for surface air access. Denying surface access in densely stocked systems causes distress and can be fatal. As production expands globally, welfare standards must address the full range of production contexts from European RAS systems to tropical pond culture.

What You Can Do

Ensure Clarias catfish always have surface access in any aquaculture system
Advocate for electrical pre-slaughter stunning in Clarias production globally
Support welfare research on Clarias catfish and other African aquaculture species
Choose European-farmed Clarias where available -- standards are currently higher than most tropical operations