Emerging neuroscience research is reopening questions about whether bivalves have any capacity for aversive experience, requiring updated ethical consideration.
The bivalve sentience question has moved from dismissal to genuine scientific engagement over the past decade. The enormous scale of bivalve production makes even small probability of sentience morally significant. Scallop escape responses to predators suggest at least rudimentary threat-avoidance processing. Whether this involves anything like subjective suffering remains genuinely unknown. The precautionary approach — favoring rapid death methods, avoiding unnecessary physical damage, and improving husbandry conditions — costs little and provides insurance against inadvertently causing large-scale suffering if bivalves turn out to have more welfare-relevant capacity than currently assumed. This is a case where scientific humility and ethical caution align with practical feasibility.