In Australia, the introduced northern Pacific seastar (Asterias\ud amurensis) was first recorded in southeast Tasmania in 1986, where it has become\ud the dominant invertebrate predator in the Derwent River Estuary. It was probably introduced into Australia through ballast water from Japan. 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 Honours, Monash University Submitted in fulfilment of the requirements for the Degree of Doctor of Philosophy. The northern Pacific seastar, Asterias amurensis, is one of more than 100 exotic marine species known in Australian waters. Abstract. It will eat almost anything it can find, including dead fish and fish waste (CSIRO, 2004). This seastar is currently NOT established in WA but can be spread by recreational, commercial and fishing vessels in The northern Pacific seastar is a voracious feeder, preferring mussels, scallops and clams. This study compared the individual and combined effects of two introduced marine species in SE Tasmania - the northern Pacific seastar (Asterias amurensis) and the European green crab (Carcinus maenas) - and investigated their impact on native invertebrate fauna using in situ caging experiments. Workshop invitees included representatives of The northern Pacific seastar could replace seastars pulled from overseas reefs and then dried, painted and sold in interior decorating shops in Australia. It has a prefenrce for shellfish however. The northern Pacific seastar is a very active predator eating almost any animal it can capture. The Northern Pacific Seastar is a Port Phillip Bay pest. Some people call them starfish, but they really should be called sea stars as … Today I want to write about a fascinating species, the northern Pacific sea star. This diet poses a serious threat to mariculture and wild shellfish fisheries. The northern Pacific seastar, Asterias amurensis, was first collected in southeast Tasmania in 1986.Mistaken for the endemic asteroid Uniophora granifera, its true identity was not realised until 1992.It is now a conspicuous predator in soft sediment habitats in this region, and is considered a major threat to native assemblages and commercial species. Here are five interesting facts about them: These strange sea animals grow up to 50 cm in diameter. Northern Pacific seastar . The seastar is considered a serious pest of native marine organisms. Photo: Non-native to Australian waters, the Northern Pacific seastar, Asterias amurensis, is a pest that poses a serious threat to Western Australia’s aquatic environment. 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 a potential threat to the biological diversity of shallow-water marine communities, and could cause significant problems for the mariculture industry and temperate wild fisheries. It was first confirmed in Victoria in August 1995 when the first adult Northern Pacific Seastar was caught off Point Cook. University of Tasmania (July, 2001) A May 2002 workshop aimed to improve the targeting of current efforts to implement the Control Plan. Implementation Workshop summaryDepartment of the Environment and Heritage, May 2002 In 2000 Australian Government's agreed to the National Control Plan for the Introduced Marine Pest: Northern Pacific Seastar (Asterias amurensis). The Northern Pacific Seastar has 5 arms, with upturned tips at the end. Juveniles are yellow with purple markings, whilst the adults are almost entirely yellow. What is its impact? Introduced species are having major impacts in terrestrial, freshwater and marine\ud ecosystems worldwide. It is a voracious predator that is reported to be having major impacts on native bivalves and other small … I prises open their shells open with its arms before eating it.