It's shell is often completely covered in black velvety flesh, but can sometimes be seen through a gap in the covering. Two antennae indicate the location of its head and mouth. It is given the common name ducks bill limpet after the shape of it shell resembling a ducks bill. It is found in large aggregations at some dive sites inside the harbour including Wellers rock.
May reach up to 170mm long, and 110mm wide.
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