The mouth is located on the ventral side and is encircled by 20 short, dark tentacles. The anus is positioned nearly on the dorsal side and is surrounded by 5 sets of papillae. There are numerous Cuvierian tubules, which are relatively large. The coloration of the bivium varies among specimens, ranging from whitish to brown, and in some cases, it features distinct dark, eye-like markings, while others may be uniformly brown with yellow spots. The dorsal tegument displays rosettes exclusively. The ventral podia have short rods, while the dorsal podia possess X-shaped rods.