A net cage (1) for farming fish, the net cage (1) including a fish enclosure (3) which is provided with a net (2) which is capable of water throughput, and a first floating means (4) on a water surface (5) for keeping the net cage (1) in a vertical position in a water column, the fish enclosure (3) further being provided with a submerged, fish- dismissing ceiling (22), the fish-dismissing ceiling (22) being provided with at least one opening (28) which is connected to a connection channel (6) which extends from the fish-dismissing ceiling (22) to the water surface (5) and is connected to a second floating means (42； 91, 91'), and the connection channel (6) being arranged for a fish in the fish enclosure (3) to swim spontaneously up to the water surface (5) in the connection channel (6) and back down to the fish enclosure (5), and, in an upper portion (64), the jacket (62) of the connection channel (6) being provided with a swash portion (68) projecting above the water surface (5). A method of farming fish in such a net cage (1) and use of the net cage (1) are described as well.
