Haliotis rugosa Lamarck, 1822
Distribution: Mascarenhas archipelago.
Size to 61mm. Subtidal to a few meters deep.

This specimen was fished at 2m deep, under coral stone, in the lagoon,
in Mahébourg Bay, Grand Port, Mauritius. This is the type locality. 36,5mm.
Typical features: dorsal surface with flat cords of variable widths, growth marks,
large columella, spire visible in ventral view.
Same spot, 33mm. The dorsum sometimes shows an alternance of large and thin cords.
Columella flat and wide. Near the spire, it is always striated.
Same spot, 23 & 30,5mm. The colours are variable.
Typical features are these "watercolor-like" transitions (Geiger) between two patches:
the borders are not clearly delimited; often, they are fuzzy.
A fascinating species.
On beach, after storm, Bel Ombre, Mauritius. 27-28-29mm.
Dead collected at low tide in lagoon near reef, south of the gully of Trois Bassins,
Souris Chaude, Réunion island. 23-32mm.
Strong sculpture.
Under coral stones, at extreme low tide, Flic-en-Flac, Mauritius. 25mm.
Weak sculpture.
Trois Bassins, Souris Chaude, Réunion. 41,5mm.

     All pics © Olivier Caro