Asian date mussel/bag mussel (Musculista senhousia)

What to look for

  • Shell has zig zag markings & iridescent radiating bands.
  • Shell olive green/brown & is easily crushed. Up to 3cm long.


  • Prefers soft sediments but also fouls artificial hard surfaces.
  • Up to 20 m depth.


  • Can form mats on soft sediments smothering bottom communities & altering food availability.

Current locations 

  • Portland & Port Phillip Bay, Vic;
  • estuary mouths in northern Tas;
  • SA;
  • Cockburn Sound,
  • Lower Swan River & Fremantle, WA 

What you can do

  • Inspect & clean niche areas & antifoul boat hulls regularly.
  • Clean & dry equipment before transporting & using in a different location.

More information

More information on this pest can be found on the National Introduced Marine Pest Information System

Report a sighting

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