Are flatworms endoparasites

Flatworms include both endoparasitic and free-living species. Many flatworms, such as tapeworms and flukes, are indeed endoparasites that live inside the bodies of their hosts, often causing harm. In contrast, other flatworms, like planarians, are free-living and found in aquatic environments. Thus, while some flatworms are endoparasites, not all flatworms fit this classification.