About Haliotis scalaris (Leach, 1814)
This species, Haliotis scalaris (Leach, 1814), has a shell ranging in size from 60 mm to 100 mm. The shell is depressed, with a rounded-oval to irregularly oval shape; it is moderately large but thin. Its color pattern is reddish, or variegated olive and green. The shell has 5 to 6 open perforations; a strong rounded spiral rib sits inside the row of these elevated tubular holes, and a smaller, nodose spiral rib is located outside of this row. Above, the shell is finely striated spirally, with prominent elevated radiating coarse lamellae between the spire and the inner spiral rib, and additional prominent elevated radiating lamellae surrounding the spire. The inner surface of the shell is silvery, strongly iridescent, and has excavations that match the elevations on the shell's outer surface. The columellar plate is narrow, and is obliquely truncated at its lower end. This is a marine species that is endemic to Australia, where it occurs along the coast from south-western Western Australia to Victoria, including Tasmania.
