Arms typically 8, discrete finger-like, frequently of different lengths. Disc small. Variable colour with shades of grey, brown or red, and black, greenish-grey, cream or white markings. Centre to arm tip up to 5 cm.
This species' scientific name means "many arms". It has fissiparous reproduction where the animal divides in two to create new individuals.
Under-surface of rocks, including the lower intertidal zone, to depth of 238 m.
Recorded in Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed