Asian clam
Corbulidae - Potamocorbula amurensis
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What does it look like?

Asian clam occurs in estuaries and brackish waters, particularly in mud, sand, peat and clay surfaces. Often can be found buried in large clumps with some of the shell exposed above the surface. Dirty white, yellow or tan in colour, with a very visible overbite – i.e. the two shell halves are different in size and shape. 2-3 cm across.

Why is it a problem?

Asian clams can live in fresh and salt water. Because they consume large amounts of phytoplankton and zooplankton, they can have profound impacts on any marine community.

Control Methods

You must notify the Northland Regional Council or the Ministry for primary Industries if you suspect the presence of this organism

You can help prevent the spread of marine pests by:

• Regularly cleaning your boat’s hull – ideally keep fouling growth to no more than a light slime layer.

• Applying good thorough coatings of antifouling paint and keep it in good condition

• Ensuring your hull is clean and free of fouling before you go travel to a new region

• Cleaning and drying any marine equipment (e.g. ropes, lines, pots) before using in a new location.

• Inspecting areas on your boat that retain water in case they’re harbouring marine life.

• Checking anchors, trailers and other equipment for tangled weeds.

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