The Combined Nomenclature (CN), v1:2018
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=bdccfab4-a71c-4f32-8b96-d3d9ed56013c