European or basket shell clam (Varicorbula gibba)
What to look for
- Shells not equal size, one is larger & fits like a lid, overlapping the other.
- Coarse grooves & ridges.
- Shell is plump, broadly oval coming to a triangular end.
- Shell colour is white to pink with radiating red/brown rays.
- Up to 2 cm long
- Burrows into soft bottomed habitats, may attach to gravel & stones.
- Intertidal to 150 m depth.
- Temperate waters.
- Can form mats on soft sediments smothering bottom communities & altering food availability.
- Northern & south-eastern Tasmania
- Port Phillip Bay
- Western Port Bay Victoria
What you can do
- Inspect & clean niche areas & antifoul boat hulls regularly.
- Clean & dry equipment before transporting & using in a different location.
More information on this pest can be found on the National Introduced Marine Pest Information System.