PROBLEM TO BE SOLVED: To provide a shellfish farming system capable of improving the survival rate of farmed shellfish and achieving stable production. A shellfish farming system includes a farming tank 10, an upper lid 20, and a grid 30. The aquaculture tank 10 is infused with nutrient water for aquaculture, the upper lid 20 covers the aquaculture tank 10, and the grid 30 has a multi-layered aquaculture net and is placed in the aquaculture tank 10. By using a multi-layer grid having a multi-layered aquaculture net in the aquaculture tank 10 and placing shellfish in each aquaculture net, the aquaculture area can be significantly increased and the production amount can be increased. When collecting the grown shellfish, the grid 30 can be lifted from the aquaculture tank 10 and collected, thereby saving the labor of collection. [Selection diagram] Fig. 1【課題】養殖貝類の生存率を向上させ、安定生産を達成できる貝類養殖システムを提供する。【解決手段】貝類養殖システムは、養殖槽１０と、上蓋２０と、グリッド３０とを含む。養殖槽１０には養殖用の栄養水が注入され、上蓋２０は養殖槽１０の上を覆い、グリッド３０は多層の養殖網を有し、養殖槽１０の中に置かれる。養殖槽１０内で多層の養殖網を有する多層グリッドを用い、各養殖網に貝類を置くことで養殖面積を大幅に増やし、生産量を増やすことができる。成長後の貝類の採取時、グリッド３０を養殖槽１０から持ち上げて採取することで採取の手間を節約することができる。【選択図】図１
