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→Introduction
==Introduction==
==Introduction==
[[File:Argulus.jpg|250px|thumb|right|'''Fish Louse (''Argulus sp.'') attached to the skin of a fish ''']]
[[File:Argulus.jpg|250px|thumb|right|'''Fish Louse (''Argulus sp.'') attached to the skin of a fish (Wikimedia Commons)''']]
The '''fish louse''' is a '''metazoan parasite''' of '''freshwater fish'''.
The '''fish louse''' is a '''metazoan parasite''' of '''freshwater fish'''.
enzymes into the surrounding tissues and then feeds on the digested bodily fluids.
enzymes into the surrounding tissues and then feeds on the digested bodily fluids.
A consequence of this is '''localised inflammation and irritation''' of the skin, which is a welfare concern. It also allows secondary '''opportunistic infections''' to develop, and can transit '''bacterial and viral infections''' directly.
A consequence of this is '''localised inflammation and irritation''' of the skin, which is a welfare concern. It also allows secondary '''opportunistic infections''' to develop, and can transit '''bacterial and viral infections''' directly.
==Diagnosis==
==Diagnosis==