European North Atlantic ranavirus (ENARV, Iridoviridae ), is a ranavirus species recently isolated from lumpfish ( Cyclopterus lumpus , L.), which are used as cleaner fish in Atlantic salmon ( Salmo salar ) farming in Northern Europe. This study aimed to investigate (1) the virulence of ENARV isolates from Ireland, Iceland and the Faroe Islands to lumpfish; (2) horizontal transmission between lumpfish; and (3) virulence to Atl...