Definition of fish louse in English:

fish louse

Syllabification: fish louse

noun

An aquatic crustacean that is a parasite of fish, typically attached to the skin or gills.
  • A free-swimming crustacean with a shieldlike carapace and a pair of suckers (class Branchiura: several genera, in particular Argulus).An elongated crustacean that becomes permanently attached to the host and typically highly modified (class Copepoda: several orders and numerous species).

Definition of fish louse in:

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