Cuvier, 1797
Description:
Body distinctly warty, up to 1000 mm total length, with maximum arm spread of 3000 mm, but commonly much smaller. Arms are thick and stout, bearing two longitudinal rows of suckers. Arm length is 70-85 % of total length.
Habitat:
On rocky coasts, from the shallow sublittoral to 100 m.
Distribution:
Widely distributed in the warm temperate Atlantic, reaches its north-eastern limit in south-western Britain and the western English Channel, where it varies in abundance from year to year (Distr. O. vulgaris).