Dry weight diet data for blue whiting (Micromesistius poutassou), glacier lanternfish (Benthosema glaciale), Norway pout (Trisopterus esmarkii) and pearlside (Maurolicus muelleri) from samples collected in Vestfjorden and Vesterålsfjorden in April 2024. The purpose of this data collection and analysis was to investigate the diet of fish species in Northern Norway, both to supplement data for some species, but also to study the diet of species where data are scarce.

For the four studied species, individuals were selected for stomach analysis if they were in good condition and without an inverted stomach. Predator lengths were measured for all species, and predator weights were measured for blue whiting and Norway pout. Based on visual analysis, different prey groups found in the stomach content were separated and identified to the most detailed taxonomic level as possible. For each fish sample of the four studied species, identified prey group heaps from a fish sample were dried and weighed.