Lernaea (also spelled Lernea) is a genus of copepod crustaceans commonly called anchor worms, parasitic on fresh water fishes.
Fish with worm1

Fish with an anchir worm

They mate during the last free-swimming (copepodid) stage of development. After mating, the female burrows into the flesh of a fish and transforms into an unsegmented, wormlike form, usually with a portion hanging from the fish's body.


Fish Lice.

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