The invention relates to a suction tool (10), configured and adapted for gutting fish (11) opened at the abdominal cavity, comprising a suction pipe (13) forming a main channel (12), wherein the suction pipe (13) has a connection (14) for a vacuum unit (15) at a free end and a suction opening (16) at the opposing end facing the abdominal cavity in the operating state, wherein the suction opening (16) laterally passes out of the suction pipe (13) and is thereby oriented radially in relation to the central axis M of the suction pipe (13), characterized in that an additional pipe element (23) for forming an auxiliary air channel (24, 31) is arranged in the region of the suction opening (16) of the suction pipe (13), wherein the pipe element (23) is arranged and adapted in such a way that a continuous suction air volume flow is maintained in the operating state of the suction tool (10). The invention also relates to an apparatus (17) and a method for gutting fish (11) opened at the abdominal cavity.