PROBLEM TO BE SOLVED: To provide a growth unit for fishery organism of upwelling system, capable of offering a high-density growth for fishery organism without feeding artificially and drastically saving the labor in the growth process even in an artificial water area.SOLUTION: The top surface of an upbringing container 1 is closed by a detachable lid body 3 to make it a cylindrical shape with a bottom surface opened, and a bottom surface filter 2 of a mesh size that can hold a fishery organism growth unit S is provided at the bottom surface of the upbringing container 1. A drain pipe 3a is hung from the nearly central part of the lid body 3 so that water communication is achieved in the water area inside and outside the upbringing container 1. A belt-like floating body 3c is wound and fixed to the upper periphery of the upbringing container 1 which is floated with the lid body 3 portion exposed on a water surface W where the container is located.【課題】人工的に飼料を供給することなく水産生物の高密度育成が可能となり、また、人工水域においても、育成工程を極めて省力化できるアップウエリング式の水産生物育成装置を提供する。【解決手段】育成器１の上面を着脱自在な蓋体３により閉蓋し、底面が開放された筒状とし、その底面に水産生物育成装置Ｓを保持可能な目合いのメッシュサイズの底面フィルター２を張設する。蓋体３の略中央部から垂下して排水パイプ３ａを設け、育成器１内外の水域と通水可能にする。育成器１の上部周縁に帯状浮体３ｃを捲巻固定し、投入された設置水面Ｗ上に蓋体３部分が露出した状態で浮遊させる。【選択図】図１
