With the emergence of new DNA sequencing techniques, the study of different environmental viral communities has been boosted, which has led us to realize that we know less than 1% of the global viral diversity. It is common in the different studies carried out on viral communities that the vast majority (80% on average) of the data remain unanalyzed because they do not have significant similarity to reference viruses (being the comparison with reference databases the main tool for analysis). Although massive sequencing techniques have boosted the number of (short) sequences of viral origin deposited in databases, sequencing of complete viral genomes has been limited, causing reference databases to stagnate in size. This makes it imperative to develop bioinformatics tools that allow us to better discover and characterize this viral diversity and unravel the full potential that these genomes are encoding. An important line of research in the group is to develop such tools adapted to modern sequencing technologies and state-of-the-art computational tools currently available.