The Northern Pacific sea star is a voracious predator that will feed on a wide variety of other marine animals, including shellfish, crabs, worms and even dead fish and other sea stars. Additional support has come from the Marisla Foundation, UM College of Literature, Science, and the Arts, Museum of Zoology, and Information and Technology Services. In Australia, the introduced northern Pacific seastar (Asterias amurensis) was first recorded in southeast Tasmania in 1986, where it has become the dominant invertebrate predator in the Derwent River Estuary. Estimates made in Port Philip Bay (where they were first detected), indicate that numbers reached as much as 12 million individuals in two years. The ADW Team gratefully acknowledges their support. It can affect commercial fishing and aquaculture. Asterias amurensis (northern Pacific seastar) has the potential to establish large populations in new areas. The starfish is native to the coasts of northern China, North Korea, South Korea, Russia and Japan and distribution of this species into other countries has increased. There are two native seastars that look similar, Coscinasterias muricata (11 arms) and Uniophora granifera, but these native seastars have arms with rounded tips. The Northern Pacific starfish, (Asterias amurensis) is an invasive species in Australia. Taxonomic name: Asterias amurensis Lütken, 1871 Synonyms: Allasterias rathbuni nortonens Verrill, 1909, Allasterias rathbuni var. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. The northern Pacific seastar, Asterias amurensis, is one of more In their native range they are known to go through 'bust and boom' cycles reaching high abundance and then rapid decline (NSW, 2007). anom Verrill, 1909, Allasterias … Asterias amurensis (CRIMP - CSIRO Marine Research) Which Native Seastars Look Similar? Northern Pacific seastar (Asterias amurensis) is a large, aggressive predator of native species, including oysters, mussels and scallops. Introduced species are having major impacts in terrestrial, freshwater and marine ecosystems worldwide. Consider this as there's more and MORE of these and as the two species begin to impact all of the bivalves in the region. Impact of the northern Pacific seastar Asterias amurensis on soft sediment assemblages, including commercial species, in southeast Tasmania by Donald Jeffrey Ross Bsc, Melbourne University Asterias amurensis apparently feeds on the BIG bivalve prey VERSUS the crab, Carcinus maenas which feeds on the small ones!! Asterias rubens occurs on the English and North European coasts, A. vulgaris is found on the North Atlantic coast of North America, A. forbesi occurs on the eastern sea shore from the Maine to the Gulf of Mexico, A. amurensis is found in the Behring sea, Japan and Korea, and A. tenera occurs on the sea shore from Nova Scotia to New Jersey. What to look for. The Northern Pacific Seastar The northern Pacific seastar, Asterias amurensis, is believed to have been introduced to south-eastern Tasmania in the late 1970s or early 1980s either as larvae in ballast water, or as juvenile or adult seastars on the hulls of international ships. Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students.ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Features: yellow to orange with purple markings (juvenile) yellow (adult) 5 arms with pointed upturned tips; up to 50cm across. The Northern Pacific sea star is a voracious predator that will feed on a wide variety of other marine animals, including shellfish, crabs, worms and even dead fish and other sea stars. It is on the Invasive Species Specialist Group list of the world's 100 worst invasive species.

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