Aeromonas salmonicida is an important pathogen to both freshwater and marine fish in aquaculture (Dallaire-Dufresne et al., 2014).There are five subspecies reported so far: salmonicida, smithia, achromogenes, masoucida and pectinolytica (Cipriano & Bullock, 2001;Garrity et al., 2005). Initially, A. salmonicida is popular and often reported in areas with a relatively low average atmospheric temperature, for example, Canada (Morin, 2010), European countries (Bartkova et al., 2017), etc. However, a wide infection caused by A. salmonicida has been reported in different species of fish worldwide, including rainbow trout (Oncorhynchus mykiss), Atlantic salmon (Salmo salar), arctic char (Salvelinus alpinus), brook trout (Salvelinus fontinalis), brown trout (Salmo trutta), carp (Cyprinus carpio), goldfish (Carassius auratus), orange-spotted grouper (Epinephelus coioiaes) and sablefish (Anoplopoma fimbria) from