PaDIL - Fact Sheet Page 1 of 4

Northern Pacific Seastar Asterias amurensis (Lütken, 1871) Echinodermata: Asteroidea: Asteriidae Status Exotic (established in Australia) High Impact Pest Species

Other Common Names None Listed

Scientific Synonyms None Listed

Host Types Marine

Distribution - Regions Australasian - Oceanian South and South-East Asia

Distribution - Notes

Diagnostic Characters: Colour: mainly yellow with purple hues, particularly near the tips of the arms;

Number of arms: 5;

Arm radius: to 25cm;

Further description: Arms are gradually tapered to a pointed tip. The convex dorsal surface is covered in irregular rows of small spinelets.

Broad Sweep Marine

Commodity Marine

Specifics

Specimen Contact Point [email protected]

Name Tim O'Hara

Web links None Listed

Padil links Eleven Armed Seastar

http://www.padil.gov.au/viewPest.aspx?id=1161 13/06/2008 PaDIL - Fact Sheet Page 2 of 4

Knobby Seastar

References O'Hara, T.D. & Byrne, M. (in prep). Echinoderms, fauna of Australia. CSIRO.

Acknowledgements

Citation Dane, E. & O'Hara, T.D. (2008) Northern Pacific Seastar (Asterias amurensis) Pest and Diseases Image Library. Updated on 6/06/2008 3:27:29 PM. Available online: http://www.padil.gov.au

Last Updated 6/06/2008 3:27:29 PM

Diagnostic Images

Arm

Caption: Locality: Mornington Pier, Victoria, Australia

Source: Julian Finn, Museum Victoria

http://www.padil.gov.au/viewPest.aspx?id=1161 13/06/2008 PaDIL - Fact Sheet Page 3 of 4

Host Damage

Caption: Locality: Mornington Pier, Victoria, Australia

Source: Mark Norman , Museum Victoria

Spine pattern

Caption: Locality: Mornington Pier, Victoria, Australia

Source: Julian Finn, Museum Victoria

http://www.padil.gov.au/viewPest.aspx?id=1161 13/06/2008 PaDIL - Fact Sheet Page 4 of 4

Overview Images

Dorsal

Caption: Locality: Mornington Pier, Victoria, Australia

Source: Mark Norman, Museum Victoria

Full size images available at http://www.padil.gov.au.

http://www.padil.gov.au/viewPest.aspx?id=1161 13/06/2008