It is described a floating fish cage (1) for farming fish (2), said fish cage (1) having a lower portion (3) and an upper portion (4), the lower portion (3) comprising a submerged fish enclosure (30) and the upper portion (4) comprising a channel (40) extending from the submerged fish enclosure (30) towards a water surface (5), wherein a portion (41) of the channel (40) is separated from the submerged fish enclosure (30) by a separation device (6) comprising an inlet (60) and an outlet (61), the separation device (6) being tapered from the inlet (60) towards the outlet (61) thereby allowing fish (2) to swim in one direction (62) only through the separation device (6) from the submerged fish enclosure (30) into the portion (41) of the channel (40), wherein the separation device (6) at the outlet (61) has a free end portion enabling the fish (2) to enter the channel (40) undisturbed. (Fig. 1)