Carbohydrate active enzymes (CAZymes) and sulfatases contents from 127 genomes of the genus Vibrio, 111 genomes of Mycoplasma, 6 genomes of Polaribacter, 2 genomes of Roseobacter, and 2 genomes of Psychromonas were retrieved from the CAZY and SulfAtlas websites [32, 91–93]. No Psychrilyobacter genome was available on the CAZY website, so the Psychrilyobacter atlanticus DSM 19335 genome was downloaded from NCBI, project accession PRJNA195804  as well as genomes from the fish-associated mycoplasma Mycoplasma mobile 163K  as an example of marine Mycoplasma and Vibrio halioticoli, project accession BAUJ00000000 , a Vibrio isolated from abalone . CAZyme and sulfatase annotations of each sequence were performed manually by homology with sequences from the CAZy and SulfAtlas databases, from which fasta files can be downloaded, using a minimum sequence identity of 25%, and a minimum query and hit coverage of 70% between amino-acid sequences. To investigate pyruvate to acetate fermentation, a database including sequences of the enzymes involved in the according pathways was manually created to further annotate genes from P. atlanticus, M. mobile, and V. halioticoli by homology, following the same conditions as for CAZyme gene annotation (for details on the pyruvate to acetate fermentation database, see Additional file 6: Table S5, Additional file 7: Table S6 and Additional file 8). Gene annotations were carried out using the ngKLAST software (ngKLAST release 4.2, 2007–2013, Korilog SARL, France).