The EBI Metagenomics portal The EBI Metagenomics portal [6] is a free to use analysis service for metagenomics data. In order to have your data analysed by EBI Metagenomics, your sequence data have to be archived in the European Nucleotide Archive [7] (ENA). This tutorial will explain why you have to follow this procedure and will then guide you through the process of archiving your metagenomic data in the ENA.