In this thesis catch composition of creels targeting Norway lobster, Nephrops norvegicus, in the area of Klenovica (fishing zone E, Northeast Adriatic) was analysed. Samples were collected during ten fishing days in period from March 19th to May 8th 2020. In total 3000 creels were analysed. Commercial creels mounted with square mesh netting of 36 mm were used. In total, 9392 individuals belonging to 9 different species were caught. Harbour crab, Liocarcinus depurator, and Norway lobster, N. norvegicus, were the most abundant crabs in catches, while, blotched picarel, Spicara maena, was the most dominant fish species. Despite the fact that 5 individuals of Norway lobster caught with creels were below minimum conservation reference size (MCRS = 2 cm CL), discarding did occur. The average carapace length (CL) at which an individual of Norway lobster had equal chance of being discarded or retained was 3 cm. All retained Norway lobsters were sorted in two length categories, “small” and “large”. The length of “small” Norway lobster ranged from 3 to 3.9 cm CL, and of “large” from 4 to 5.7 cm CL. The average length of individual Norway lobster which had an equal chance of being categorized as “small” or “large” was 4.1 cm CL.