Replication data for: Resource partitioning among small pelagic fish remains stable regardless of food availability in a seasonally pulsed upwelling system (2020-2021)

This dataset includes biological information, the isotopic (carbon and nitrogen) and fatty acid compositions of three species of small pelagic fish (sardine, anchovy and round herring) caught between November 2020 and June 2021 on the coast of South Africa during surveys conducted by the Department of Environment, Forestry and Fisheries (Cape Town, South Africa) on board of the Africana RV.