The whelk industry in Granville Bay has lost its 'MSC Sustainable Fishing' certification due to a decade-long decline in production, primarily caused by climate change. Despite efforts like setting minimum catch sizes and quotas, production continues to fall as rising summer and winter temperatures impact whelk feeding and reproduction, leading to higher mortality rates. With management options exhausted, proposals have been made to increase sorting grid sizes and check equipment to ensure they match the whelk's maturity size.