Hellobdella nociva’s body exhibits a translucent quality. Its appearance is characterized by a dull green hue, with five prominent brown longitudinal stripes adorning the dorsal surface. Positioned on ring 4, a single pair of eyes is discernible. Additionally, two pairs of papillae are observable on the dorsal side. The mouth leads into the anterior sucker. Notably, it possesses a crop featuring six pairs of simple lateral caeca.