Damage to substrates through scallop dredging and trawling may have assisted the spread of non-indigenous taxa such as the New Zealand Screw Shell (Maoricolpus), Northern Pacific Seastar (Asterias amurensis), and the Mediterranean sabellid polychaete (Sabella spallanzanii). Sabella spallanzanii only appears to colonise disturbed habitats, and the scallop industry has been implicated in its spread in Port Phillip Bay (Currie and Parry 1996).



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Department of Environment and Heritage