A feeding system (5) for a closed pen (1) for fishfarming, the closed pen (1) being provided with a water-supplysystem (3) comprising a supply pipe (31) which, at its upperportion (39), is provided with a housing (6) with a lower portion(60), a middle portion (65) and an upper portion (69), there being,extending from the middle portion (65) of the housing (6),a feeding pipe (33) which is arranged to convey water that isentering the housing (6) at the lower portion (60) to the inside of theclosed pen (1), and the feeding system comprising a feed hopper(51) and a feeder (53) for carrying a feed out of the feed hopper(51) and up to a mouth (57), the mouth (57) being positioned atthe upper portion (69) of the housing (6), and the housing (6) beingprovided with a passage between the upper portion (69) andthe middle portion (65) so that the feed is carried in the waterand into the closed pen (1).
