Haliotis ovina Gmelin, 1791
Distribution: Ryukyu to Queensland & West Australia, Maldives to Society.
Size to 92mm. Subtidal to 30m deep, in dead coral and in crevices.

Syn: latilabris Philippi. The main characteristic of this variable species is the wide columella,
which draws on ventral side the shape of a ram horn around the spire. Moreover, the whole shell
suggests this image of horn. 1m deep, at low tide, Onna Point, Okinawa, Ryukyu. 48mm.
Spire and sculpture variation. The green shell is flat with some sparse bump, while the brown one is taller,
with spiral cords and little nodules. Shallow water, on rocks, Samar, Philippines. 53-61mm.
Flatter and smoother, with fine opisthocline ribs near the holes.
In shallow water, Phuket, Thailand. 49mm.
Under dead coral and rocks, at 1-2m deep, Madura Island, Java, Indonesia. 45mm.
Broome, West Australia. 37mm.
Two green specimens from Masbate island, Philippines. 48-64mm.
Let's keep in mind that true ovina have bumps, cords, nodules; to make this long story short,
this is not a smooth shell.
Philippines again, with an orange shell. 10-20m deep, under coral, Masbate island. 46mm.
Notice the fine crenulation that follows the suture.
Pale purple and green: 15m deep, Sumilon island, Cebu, Philippines. 45mm.

All pics © Olivier Caro