The Combined Nomenclature (CN), v1:2023
0303 14 20: Frozen trout "Oncorhynchus mykiss", with heads and gills on, gutted, weighing more than 1,2 kg each, or with heads off, gilled and gutted, weighing more than 1 kg each
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/kn?id=6288e2f3-11bf-4206-90bf-a3b6f6ebbc4d