Polychaetes: an Interactive Identification Guide brings together new and existing information making polychaete identification simpler and more accurate. Eighty-three families and about 1150 living genera of polychaetes are recognised worldwide, and all can be identified using this practical, easy-to-use CD-ROM. In addition, most of the known Australian polychaete fauna – more than 1200 species – can also be identified. All interactive keys have been developed in DELTA software using the interactive identification program Intkey. A browser interface provides quick access to this rich information package. A detailed Overview section includes general notes on polychaetes, study methods. Also provided for each family of polychaetes are diagnoses, diversity and natural history data, identification tips and principal references, making this a valuable resource on polychaete diversity anywhere in the world. In addition, checklists and interactive keys comprise the best available identification guide to all known Australian polychaete species.