A salmon lice infestation (IMAGE)

Norwegian University of Science and Technology

A salmon lice infestation

Caption

The salmon industry has made the louse's life's work easier. In the past, it was rare for a lone louse to encounter a host fish out in a fjord. Fish farming has enormously increased the availability of host fish, and the number of lice has skyrocketed. 

Credit

Photo: Bengt Finstad

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