mainly salmon and tuna products as well as alaska pollack fillets were imported and in half of all imports originated from the eu poland was the most important single supplier of fish and fisheries products in ahead of the people s republic of china hereafter china and was instrumental in ensuring that the german market was supplied with adequate quantities of canned herring deepfrozen breaded fish fillets and salmon products in most federal states people are required to hold an angling licence if they wish to engage in independent poleandline fishing which requires knowledge in the subjects of fish biology hydrology water management animal welfare and water conservation