| Salmon louse, Sea louse, Caligus, Copepod, Caligus elongatus|
Lepeophtheirus is a genus of sea lice. The best-known species is L. salmonis, the salmon louse. Other species include L. pectoralis, which uses flatfish as its host, particularly the European flounder, and is also the type species of the genus Lepeophtheirus.
Lepeophtheirus contains 122 species: