The species is constant in shape as in sculpture.
It varies a little in coloration and pattern. 72mm. From coll. Ernest Zurrer (NZ).

10-12m deep, under rocks, Rottnest Island, Perth. 78mm.

Same spot, same depth. 83mm.

Two decorative items from an Octopus' collection. 85-91mm.
20m deep, Freemantle, W. Australia. Original pictures © R. Kershaw.