Dinobella ferox is approximately 8-10 cm long, with a flexible body featuring a convex dorsal surface and a flattened ventral surface. It is pale or light green in color, with no dorsal pattern. The anterior part is relatively narrow, with a spoon-shaped anterior sucker and no protrusible proboscis. The posterior sucker is well-developed. It has five pairs of small eyes, with the first pair being comparatively larger. The jaws are toothless.