The scientific debate about fish pain and consciousness has largely been resolved in favor of fish sentience, with important implications for fisheries and aquaculture welfare.
The scientific understanding of fish pain has undergone a paradigm shift over two decades of research. From the dismissive position that fish are reflexive automatons, welfare science has established through behavioral, pharmacological, and neurological evidence that fish experience functionally significant pain. This does not mean fish experience pain identically to mammals, but it means the probability of welfare-relevant suffering is high enough to require serious ethical consideration. This scientific evolution has profound implications for fisheries management, aquaculture, and the ethics of recreational angling.