The characterization and quantification of diets of nine commercially important Celtic Sea fish species (black‐bellied angler Lophius budegassa , blue whiting Micromesistius poutassou , Atlantic cod Gadus morhua , haddock Melanogrammus aeglefinus , European hake Merluccius merluccius , megrim Lepidorhombus whiffiagonis , European plaice Pleuronectes platessa , common sole Solea solea and whiting Merlangius merlangus ) was unde...