[Korea Farmers' News Agency Reporter Young-jin Choi] A technology that reduces the organisms that attach to oyster shells, a major concern in oyster farming, by up to 63.7% compared to before has been developed. The National Institute of Fisheries Science's Southern Marine Products Research Institute revealed on the 30th that this result was achieved by placing oyster shells in a dedicated cage made of high-density polyethylene (HDPE) material and installing it within a depth of 50 cm in the cage. This device for reducing attached organisms was developed by utilizing discarded oyster shells as a substrate for the attachment of larvae of attached organisms. Most oyster farming in our country is carried out using offshore cage methods, resulting in reduced product quality due to attached organisms and additional costs for removal work, which are expected to reach 86 billion won annually.