PROBLEM TO BE SOLVED: To provide a cage in which a submerged plant can be easily transplanted to a lake without damage in a grown state, cultivated while protecting the submerged plant from animals foraging, and rapidly recovered. A cage comprising a cultivation pot 100 made of a biodegradable material, a water resistant frame member (framework) 200, and a water resistant aquatic plant protection net 300. The cultivation pot 100 is created in a size that is easy to carry, and is provided with a structure capable of fixing and removing the frame member (framework) 200. The aquatic plant protection net 300 has a shape that can be locked to the frame member (framework) 200 and the cultivation pot 100. By submerging the frame member (framework) 200 and the aquatic plant protection net 300 in a state where the submerged plant is planted in the cultivation pot 100 and transplanting the whole cultivation pot 100 into the lake, transplanting can be performed quickly and easily, and damage to the plant is minimized. It can be limited. Further, after fixing, by removing the frame member (framework) 200 and the aquatic plant protection net 300 and leaving only the cultivation pot 100, it is possible to shift to a natural state while minimizing damage to plants. [Selection diagram] Fig. 4【課題】沈水植物を栽培した状態でダメージを与えることなく湖沼に簡単に移植し、沈水植物を採餌する動物から保護しながら栽培し、速やかに回収できるケージを提供する。【解決手段】生分解性の素材で作成した栽培ポット１００と耐水性の枠部材（骨組み）２００および耐水性の水生植物保護ネット３００からなるケージ。栽培ポット１００は持ち運びを考慮したサイズで作成し、枠部材（骨組み）２００を固定および取り外しできるような構造を付与する。水生植物保護ネット３００は枠部材（骨組み）２００と栽培ポット１００に係止できるような形状をとる。栽培ポット１００に沈水植物を植え付けた状態で枠部材（骨組み）２００と水生植物保護ネット３００を被せて栽培ポット１００ごと湖沼に移植することで、素早く簡単に移植が行え、植物へのダメージを最小限にできる。また、定着後は枠部材（骨組み）２００と水生植物保護ネット３００を取り外し栽培ポット１００のみを残すことで、植物へのダメージを最小限に抑えながら自然状態に移行できる。【選択図】図４
