Vibrio anguillarum was isolated from several organs of some aquarium catfish in a fish population with high mortality. Macroscopic examination of the affected catfish revealed ascites in the abdomen, site-petechiae, and dorsal erection. Although there are some variations in phenotypic characterization among different isolates of Vibrio anguillarum, the majority show a common biochemical profile with distinct microscopic appearance that can provide presumptive identification of Vibrio anguillarum. Biochemical tests were used for identification of Vibrio anguillarum in aquarium catfish in this report.

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