The present invention relates to an arrangement for processing fish, comprising a fish slaughter device with a fish counting device, a first conveying device for transferring the stunned fish to a spiral tank device, said first conveying device having at least one first measuring device that is designed to record a first mass throughput of the stunned fish and the spiral tank device, which comprises a receptacle that is designed to receive liquid, said receptacle being equipped with a rotatably supported screw conveyor which together with the receptacle forms a plurality of fish receiving chambers in order toconvey fish present in the fish receiving chambers through the liquid, a second conveying device arranged at the second end of the receptacle which is designed to transfer the fish to at least one fish processing machine arranged downstream of the spiral tank device and a control device with an evaluation unit which is designed to determine in each case a fish-quantity-related prediction variable for at least one of the fish receiving chambers based on the number of fish recorded and the first massthroughput recorded. The invention additionally relates to a method for processing fish.
