Climate change is posing a significant threat to Greece's mussel harvest, with a predicted reduction in production and financial losses for farmers. The increase in sea temperature is causing problems in mussel cultivation, with a potential for more mass die-offs, as seen in 2021, which scientists expected to occur only once in a decade. The country's largest mussel-producing region, Pieria, is seeking compensation from the Greek state and planning the construction of a mussel-packaging plant to maintain the value of their product. The urgent need for government support to address climate-related costs in mussel farming is being highlighted ahead of the U.N. climate summit COP29.