Morphologically, digeneans differ from monogeneans in having two suckers - an anterior oral sucker and a ventral sucker called an acetabulum . They parasitize all classes of vertebrates, especially fishes.
All digenean species have at least two hosts, the first a mollusc.
In domestic animals and humans, they cause considerable economic losses and suffering. This fluke is very prominent in parasitology because it was the first digenean life cycle to be delineated in full. Adults lay non-embryonated, operculated eggs which will pass from the bile ducts of the liver into the alimentary tract. These will eventually pass out into the environment with the host feces. These miracidium will seek out and penetrate a snail host.