PROBLEM TO BE SOLVED: To provide a benthic organism rearing device capable of reproducing an environment in a brackish region in a water tank.SOLUTION: A benthic organism rearing device includes a water tank holding water, a water supply device for supplying water to the water tank, a drainage device for discharging water from the water tank, a salt supply device for supplying salt to the water tank, a water level sensor for detecting a water level of the water tank, a salt sensor for detecting salt concentration of the water in the water tank, and a control device for controlling the water supply device, the drainage device, and the salt supply device based on the information from the water level sensor, and the salt sensor.SELECTED DRAWING: Figure 1【課題】汽水域における環境を水槽内で再現することができる底生生物飼育装置を提供すること。【解決手段】底生生物飼育装置は、水が溜められた水槽と、水槽に水を供給できる給水装置と、水槽から水を排出できる排水装置と、水槽に塩を供給できる塩供給装置と、水槽の水位を検出できる水位センサと、水槽の水の塩分濃度を検出できる塩分センサと、水位センサ及び塩分センサからの情報に基づいて給水装置、排水装置及び塩供給装置を制御する制御装置と、を備える。【選択図】図１
