In recent decades, numerous human activities, mainly tourism and intensive fishing, have left a significant impact on the entire marine ecosystem. As a result, harmful effects on marine organisms and marine habitats have been recorded, the number of marine species has decreased, and their biomass is significantly lower. In addition to its gastronomic and tourist content, the island of Pag also abounds in a number of fishing activities. The aim of this final work was to investigate fishing with trawls on the island of Pag, that is, by means of the method of surveying local fishermen, data was collected for the time period from 1980 to the present day about changes in fishing tools, catches, new species, and fishermen's opinions about actions and regulations that would contribute sustainable fishing. The analysis of the data revealed that the length of the vessels, as well as the power of the engines, have increased significantly compared to the past, but despite this, the amount of catch and the biomass of fish species have decreased significantly. Today, fishermen reduce their catch to about fifteen species that are most often present in the catch, of which the most abundant is the hake (Merluccius merluccius), which is also the most frequently caught species in all examined time periods. When it comes to new species, it is important to point out that fishermen are not too familiar with the same, but they point out two species as often seen in recent decades, namely: yellowlipped barracuda (S. viridensis) and arrowhead (P. saltratrix). Although the majority of respondents decide to modify the tool, the analysis of the test reveals that the mentioned changes do not significantly affect the amount of catch, but more in facilitating work.