This document summarizes a research article that studied the histopathological changes in the intestinal tissue of Mastacembelus armatus fish parasitized by the Ptychobothridae cestode parasite Senga Sp. The normal intestinal tissue structure is described. Sections of infected intestine tissue showed the parasite penetrating the mucosal layer and damaging the villi and epithelium. Higher magnifications showed the parasite crossing multiple intestinal layers and reaching near the serosa. The parasite was concluded to have a pathogenic effect and cause damage to the host intestinal tissue to obtain nutrients, making it an important consideration for aquaculture and fish disease management.