To provide an aquatic organism jump-out prevention device capable of preventing jump out of a water tank of an aquatic organism without touching directly the aquatic organism.SOLUTION: An aquatic organism jump-out prevention device extending in a horizontal direction over a part or the whole of an inner periphery of a water tank 11, and placed in a prescribed water depth region in the water tank, includes an electrode part 14 installed on the inner periphery of the water tank 11 for breeding an aquatic organism 1, and a power supply unit 50 connected electrically to the electrode part 14, for applying an electric pulse to the electrode part 14.SELECTED DRAWING: Figure 1【課題】水生生物に直接触れることなく水生生物の水槽外への飛び出しを防止する飛び出し防止装置を提供する。【解決手段】水生生物１を飼育するための水槽１１の内周に設置された電極部１４と、電極部１４に電気的に接続され電極部１４に電気パルスを印加する電源部５０とを備え、水槽１１の内周の一部又は全部にわたって水平方向に延在し、水槽内の所定の水深領域に配置された水生生物飛び出し防止装置。【選択図】図１
