Problem to be solved: to provide an aquaculture apparatus capable of efficiently maintaining the environment suitable for the cultivation of fish and shellfish for an extended period of time.The breeding water layer 16 where fish and shellfish are rearedMicrobial purification layer 18, where microorganisms that purify water existThe lower stage water layer 20 is provided with an aqueduct tank 12 which is successively formed from aboveAquaculture tankDissolved oxygen holding means 40 for the raised water layer for holding the dissolved oxygen in the breeding water layer 16 by supplying air to the raising water layer 164666 andDissolved oxygen holding means 40 for lower water layer holding air dissolved in lower stage water layer 20 by supplying air to lower stage water layer48 andA water circulation means 30 for circulating water in the lower water layer 20 to the aquatic water layer 16A farming apparatus 10 comprising 32.Diagram【課題】微生物の浄化作用を効率的に活用し、長期にわたって魚介類の飼育に適した環境を維持可能な養殖装置を提供すること。【解決手段】魚介類が飼育される飼育水層１６と、水を浄化する微生物が生息する微生物浄化層１８と、下段水層２０とを上から順次有する養殖槽１２を備えており、養殖槽１２は、飼育水層１６にエアーを供給して飼育水層１６の溶存酸素を保持する飼育水層用溶存酸素保持手段４０，４６，６６と、下段水層２０にエアーを供給して下段水層２０の溶存酸素を保持する下段水層用溶存酸素保持手段４０，４８と、下段水層２０の水を飼育水層１６に循環させる水循環手段３０，３２とを備えている養殖装置１０である。【選択図】図１
