| Sixty-eight strains of <i>Vibrio anguillarum</i>, five of <i>V. ordalii</i> and the type strains of <i>V. alginolyticus, V. carchariae, V. damsela</i> and <i>V. parahaemolyticus</i> were compared using the API 20E gallery. Within the <i>V. anguillarum</i> strains, distinct groups could be separated mainly on the basis of their reaction on indole production and the fermentation of amygdalin and arabinose. <i>Vibrio ordalii</i>, the former <i>V. anguillarum</i> biotope 2, could easily be separated from <i>V. anguillarum</i> and from the other fish pathogenic <i>Vibrio</i> spp. |
