Integrating the seaweed transplantation process into a modular reef placement approach. The flexibility of reefs can generate different ocean current disturbance effects and will not hinder the growth of seagrass. By forming a nitrogen cycling symbiotic system between underwater coral reefs, aquatic plants, and fish, we can enhance the blue carbon effect in the ocean and promote the recovery of fishery resources. The material selected is shell concrete, which is hollow inside and can be filled with liquid feed while controlling the infiltration rate.