Disease Information

Species of parasitic sea lice currently affecting farmed fish

SpeciesKnown rangeHosts
Lepeophtheirus salmonisNorth Atlantic and northSpecific to salmonid species e.g., Pacific affecting farms in Atlantic salmon
Salmo salarCanada, USA, Japan & EuropePacific salmon, Onchorhynchus sp, Arctic charr Salvelinus
Caligus elongatusAtlantic coast of CanadaNot host specific - found on > 80 species of fish including salmonids
Caligus curtusAtlantic coast of CanadaNot host specific - occasionally found on salmonids
Caligus clemensiPacific coast of Canada, USANot host specific - occasionally found on salmonids
Caligus rogercresseyiPacific coast - ChileNot host specific - found mostly on salmonids in Chile (previously C. flexispina)
Caligus teresPacific coast - ChileOccasionally found on salmonids in Chile


Disease reprinted courtesy of OIE Diagnostic Manual for Aquatic Animal Diseases, OIE (World Organisation for Animal Health), Paris, France.