Fish Slaughter Methods and Welfare

Most farmed and wild-caught fish are killed using methods that cause prolonged suffering and do not meet basic welfare standards for sentient animals.

Key Facts

The most common fish killing method is suffocation in air or on ice, taking up to 4 hours to die
Carbon dioxide gas stunning causes significant distress before insensibility
Percussive stunning followed by spiking (ikejime) is considered the most humane method
Billions of farmed fish are slaughtered annually with little welfare consideration
The UK and several EU countries have introduced regulations on humane fish slaughter

Welfare Considerations

Fish welfare at slaughter receives far less attention than mammalian welfare despite fish being sentient animals capable of experiencing pain. Asphyxiation in air, which can take hours, is the most common method and causes prolonged distress. Carbon dioxide stunning is also severely aversive. More humane alternatives exist including percussive stunning, electrical stunning, and ikejime, but they are rarely used at commercial scale due to cost and efficiency concerns. The scale of fish slaughter makes this a major welfare priority.

What You Can Do

Advocate for mandatory humane slaughter standards for farmed fish
Support research into scalable humane fish killing methods
Reduce fish consumption or choose suppliers committed to humane slaughter
Support certification schemes that include slaughter welfare standards
Donate to organizations working to improve fish welfare in aquaculture