This project will cover the initial storage, metabarcoding (species assignment), and initial analysis of 18s data sequenced by NGI Sweden in the project: NGI18310 - "Herring larvae diet and eDNA - 18s Illumina". The data are of herring larvae stomach contents from various spawning grounds between seasons (March to October 2024), and eDNA from the local water where herring larvae were caught. This research aims to determine the extent of spatiotemporal diet variability during a critical life stage of herring, with high and selective mortality rates.