The western longnose spurdog, Squalus nasutus, is a dogfish of the family Squalidae, found on the continental shelf off the northwest and southwest coasts of Western Australia, at depths of between 300 and 510 m. Its length is at least 55 cm.The western longnose is a rare, small and slender dogfish with a narrow head and long narrow snout. There is a short medial barbel on the anterior nasal flaps. The pectoral fin has a shallowly concave posterior margin.