PROBLEM TO BE SOLVED: To provide a method for preventing a fish from colliding with a wall surface of a land rearing tank.SOLUTION: There is provided a method for preventing a fish reared in a cylindrical rearing tank 1 provided on land from colliding with wall surface of the rearing tank 1. A water supply pipe 2 is disposed on an inner wall side of the rearing tank 1, rearing water is discharged from a discharge port 4 of the water supply pipe 2 in a tangential direction of the inner wall surface, and a water flow Fs is formed in the neighborhood of the inner wall surface of the rearing tank 1 so that the fish is prevented from approaching the inner wall surface of the rearing tank 1.SELECTED DRAWING: Figure 1【課題】陸上飼育水槽の壁面への魚の衝突を防止する方法を提供すること。【解決手段】陸上に設けた円筒状の飼育水槽１内で飼育している魚が飼育水槽１の壁面に衝突するのを防止する方法であって、飼育水槽１の内壁側に給水管２を配置し、給水管２の吐出口４から内壁面の切線方向に飼育水を吐出して、飼育水槽１の内壁面付近に水流Ｆｓを形成することにより、魚が飼育水槽１の内壁面に接近するのを防ぐことを特徴とする魚の衝突防止方法。【選択図】図１
