This repository contains 6 datasets that were created in relation two surveys conducted in 2021 and 2024 where the presence of specific IAS (listed on or proposed for the Union List) on e-commerce establishments (i.e. Online retailer or Peer-to-peer platforms) in 6 EU countries (Czechia, France, Germany, Italy, Netherlands, Spain) was analysed. species_list_2021.csv and species_list_2024.csv contain the list of target species for the respective year. The columns include information on the scientific name, common name, status on the Union List, and which sector it is linked to. unique_records_2021.csv and unique_records_2024.csv contain all individual records for the respective year. The columns include information on the country, type of establishment, sector, species, life stage, and pricing results_2021.csv and results_2024.csv contain the results per species for the respective year. The columns include information on the species, type of establishment, numbers of establishments sampled & number of establishments where the species was found