PROBLEM TO BE SOLVED: To provide a fish aquaculture device capable of breeding fishes in a preferred environment while suppressing power cost low.SOLUTION: A fish aquaculture device comprises a breeding aquarium, a drainage column provided at a breeding aquarium central part, a siphon drain pipe in communication with this at the top of the drainage column, a bottom drain pipe in communication with this at the drainage column lower part, and the breeding water supply piping. The drainage column has a strainer part at the side face and a surface waste water receiver in the top surface. The surface waste water receiver is constituted of a funnel-like receiving part and a lid-like part opened in a lower part having an opening in a lower end, and comes in communication with a siphon drain pipe at the top. The siphon drain pipe comes in communication with the water surface waste water receiver in the one end, in which the other end forms an end with the cut at the lowermost part and comes in communication with a bottom drain pipe. The bottom drain pipe can discharge drainage to the outside from a breeding aquarium bottom, and forms a water level adjustment part protruding upward in a reverse "U" type as far as an upper limit of the water level in the tank is not exceeded in the outside of the breeding aquarium, and further stores the siphon drain pipe in the inside in the lowering part.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】動力費を低く抑えながら魚類を好ましい環境で飼育させることができる魚類養殖装置を提供すること。【解決手段】飼育水槽、飼育水槽中央部に設けられた排水塔、排水塔の上部でこれと連通されるサイフォン排水管、排水塔下部でこれと連通する底部排水管及び飼育水供給配管を含み、排水塔は、側面にストレーナー部、上面に水面汚水受け器を有し、水面汚水受け器は、ジョウゴ状の受け部と、下部が開放されかつ下端に開口部を有する蓋状部で構成され、上部でサイフォン排水管と連通し、サイフォン排水管は、その一端で水面汚水受器と連通し、他端は最下部で切り込みのある端部を形成し、底部排水管と連通し、底部排水管は、飼育水槽底部から排水を外部に排出可能とするとともに、飼育水槽外において、槽内水位の上限を超えない範囲で逆「Ｕ」字型に上方に突出する水位調整部を形成し、その下降部においてサイフォン排水管を内部に収納してなる魚類養殖装置。【選択図】図１
