Mercy for Animals has accused leading U.K. supermarkets of sourcing prawns from farms that use controversial practices, such as eyestalk ablation and ice-slurry slaughter. Eyestalk ablation is a method used to increase egg-laying in female shrimp by removing part of the eye, while ice-slurry slaughter involves freezing shrimp before harvesting. These practices have been criticized under the UK's Animal Welfare (Sentience) Act of 2022, which recognizes prawns as capable of feeling pain. When contacted by SeafoodSource, some supermarkets have expressed commitment to removing these practices from their supply chains.