Shell elongated-ovate, very flattened, loosely coiled, with a spiral series of 5-6 open holes, then the marks of former holes along the spire. Margin straight or gently convex on the right side (shell seen from above), definitely convex on the left side. Sculpture of irregular, unequal, flattened spiral cords, of which some are more prominent and bear regularly spaced knobs. On the living animal, epipodium with dorsally and ventrally closely packed finger structures, with thick fingers. These bundles are separated by spaces lacking such structures. From within these bundles a few longer tentacles emerge. Large, isolated tentacles appear in the middle of the epipodium which, however, are not surrounded by hand-shaped projections (Geiger, 1996).
shell brownish to greenish with irregular mottles outside, whitish to brownish along a ridge bordering the aperture, nacreous inside.
common size :
The outer surface of the shell has nodose cords, whereas in the native Haliotis tuberculata lamellosa Lamarck, 1822, spirals are wrinkled or folded, but never with discrete knobs. The latter also has a more continuous fringe of tentacles along the epipodium.
BIOLOGY / ECOLOGY
All species of Haliotis are grazers on encrusting algae on the surface of rocks. They have separate sexes and lay small eggs which are fertilized externally in the water. The larvae spend a short time in a free swimming stage, then settle on the bottom.
under rocks in shallow water; intertidally in the Indian Ocean.