The invention relates to an apparatus for automatically monitoring an apparatus for processing meat products, in particular fish, having a prediction unit for determining a produce-relevant prediction variable, wherein the prediction unit is connected to input sensors for sensing geometrical data and/or weight data of the meat product supplied to the apparatus for meat processing, having a yield-determining unit for determining at least one produce-relevant yield variable, wherein the yield-determining unit is connected to the output sensors for sensing geometrical data and/or weight data of the meat product processed by the apparatus for meat processing, and having a difference unit for calculating a difference value from the difference between one of the prediction variables and the at least one corresponding yield variable, wherein the difference unit is connected in each case to the prediction unit and to the yield-determining unit. Furthermore, the invention relates to a corresponding method for automatically monitoring the apparatus.