Scallops are among the most commercially important bivalves, but questions about their sentience and welfare during farming and processing are gaining scientific attention.
The welfare status of scallops sits at the frontier of invertebrate sentience research. Unlike oysters and mussels, scallops have more complex sensory capabilities — they can swim to escape predators, close their shells rapidly in response to threats, and show learning-like responses. Whether these responses involve any subjective experience remains debated. The precautionary principle suggests that uncertainty about sentience warrants some welfare consideration, particularly during slaughter. High-pressure processing, which kills animals extremely rapidly, may be preferable to live shucking from a welfare perspective if scallops have any capacity for suffering. Aquaculture density, disease management, and predation events during longline farming also warrant examination.