The aim of study was. to identify Clinostomum complanatum (Digenea: Clinostomidae) infectingfreshwater fish in Yogyakarta and Riau on the bases of their molecular profiles in the internal transcribedspacer region (ITS1). Samples of climbing gouramy (Anabas testudineus) infected by Clinostomum sp. wereobtained from Kali Progo River. https://www.popularfilm.blog/