ウオジラミ

noun

Japanese fish louse; Argulus japonicus

A parasitic crustacean that attaches to the skin of freshwater fish, especially koi and goldfish. The term is used in aquarium and fishery contexts.

• 金きん魚ぎょの体からだにウオジラミがついている。

  There is a fish louse attached to the goldfish's body.

• ウオジラミは魚さかなの体たい液えきを吸すって害がいを与あたえる。

  Fish lice harm fish by sucking their bodily fluids.