Arms 5, long and strongly tapered to narrow point at the tip. Tip of arm typically upturned. Disc and arm surface spines are small and fine. Pale brown to yellow to orange, sometimes with purple, typically at the tips of the arms. Centre to arm tip up to 23 cm.
This species is an introduced marine pest in Port Phillip Bay and the Derwent Estuary in Tasmania. It was reported in Tasmania in 1986 and first identified in Port Phillip Bay from a specimen collected by scallop fishermen near Point Cook in 1995. It is a voracious predator and scavenger, has a prolific reproduction capacity, and now numbers in the millions in Port Phillip Bay. This pest is sometimes confused with native species but is distinguished by the arm tips and spines on the body.
On reef, sand or other sediment, and seagrass, to depths over 30 m.
Japan and Port Phillip Bay.
Introduced to Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed