Van Don district in Quang Ninh province is known for its cobia fish farming, with about 250 cages currently in use. The fish are raised for 8 months and can weigh between 4-5kg, or 15kg after 18 months. The sea's high salinity makes it suitable for aquaculture. However, the industry has seen a decrease in demand and increased costs, leading to a surplus of about 100 tons of commercial cobia waiting to be sold. The selling price has dropped to 120,000 VND / kg due to the impact of Covid-19. The district is promoting the consumption of aquatic products through a culinary festival and agreements with enterprises to sell aquatic products locally.