parasite or worms is a freshwater fish parasite in laboratory for education.

animal ascariasis ascaris background biological biology bladderworm care cell cestoda cestode cysts disease dog education fish flat flatworm freshwater health healthy helminth hook host human infection intestinal intestine isolated larva lumbricoides magnification meat medical medicine microscope microscopic nature neck parasite parasites parasitic platyhelminthes pork proglottid raillietina raw roundworm roundworms science scientific scolex solium stage taenia tapeworm tissue white worm zoological zoology