Aliivibrio wodanis is repeatedly isolated from the infected fish during the winter ulcer outbreaks. Even though A. wodanis is not the causative agent of winter ulcer, the role of this bacterium in the course of the disease is unclear. Information about the genetic diversity of A. wodanis is essential to understand its virulence, environmental adaptation and survival strategies. In this study, the phylogeny and functional annotation of 22 A. wodanis isolates were analyzed from the perspective of their pan, core and cloud genome.