Henrik Nikolai Krøyer (22 March 1799 - 14 November 1870) was a Danish zoologist. He was a specialist on the endo- and ecto-parasites of fishes. He described the salmon louse Lepeophtheirus salmonis.

Life and work

Born in Copenhagen, he was a brother of the composer Hans Ernst Krøyer. He went to the Civic School under Nielsen who

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