Since mid-September, the East China Sea has seen a significant catch of herring, yellow herring, mackerel, and crabs, with herring and yellow herring making up the largest portion. These fish, also known as green and yellow croaker, are traditionally economically important and have seen a surge in catch this year, leading to a drop in retail price by 30% compared to last year. However, experts warn that these fish can cause allergic reactions with symptoms such as redness and swelling, especially if not fresh. Consumers are advised to ensure the fish is fresh and handle it with caution, particularly in large quantities or for those with allergies. The surge in catch has also led to a decline in sales of pickled and smoked fish, but sales of fresh fish have increased by 20%.