Pathogenicity, Neoheterobothriumhirame, Japan, Monongenea, Fisheries, Heterobothriumokamotoi, Polyopisthocotylea, Japan - epidemiology, Fishes - parasitology, Trematode Infections - economics, Fisheries - economics, Trematoda - classification, Host-Parasite Interactions - immunology, Gills - parasitology, Trematoda - isolation & purification, Fish Diseases -...