6 CD-ROMS features all information on a given species in the database is accessible through a unique scientific or common name or through common names in many languages; the wide use of multiple choice field structures standardized qualitative information; numeric fields record quantitative information that has been previously standardized; numerous cross-relationships between data tables enable previously unknown relationships to be discovered; and complementary databases provided by colleagues and linked to FishBase proper, contribute to making the combined package the most comprehensive data source of its kind.