鲈鱼
"Cucullanus elegans" is a species of parasitic nematode. It is an endoparasite of the European perch. Juvenile perch are commonly infected by "Camallanus lacustris" (Nematoda), "Proteocephalus percae", "Bothriocephalus claviceps", "Glanitaenia osculata", "Triaenophorus nodulosus" (all Cestoda) and "Acanthocephalus lucii" (Acanthocephala)