The shell is oval shaped and swollen with sculpture dividing the shell into three regions, two with strong ribs separated by one with no ribs. hen found in groups the byssal threads can intertwine to form a dense mat of threads which completely hide the animal
How to identify Musculus impactus?
What habitats does Musculus impactus live in?
Lives subtidally and offshore amongst rocks and seaweed
What is the distribution of Musculus impactus?
Occurs in southeastern and southwestern Australia (QLD, NSW, TAS, VIC, SA and WA); also New Zealand
How big does Musculus impactus grow?
Typical shell-length 30 mm
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