“…Due to its taste and high meat quality, spotted knifejaw has great economic potential and emerged as an important aquatic fish species (Shimada, Nokubi, Yamamoto, Murata, & Kumai, ). However, viral infection has become the bottleneck in the spotted knifejaw industry and has greatly limited the annual productivity (Dong et al, ; Kawato, Yamashita, Yuasa, Miwa, & Nakajima, ; Shuang et al, ). Among the viruses that infect spotted knifejaw, the megalocytivirus genus has attracted special scientific interest because of its wide infectious spectrum in fish.…”