
A broken hairy mussel shell and a different type of mussel shell
The’ hairy mussel’ as its name suggests is a mussel, which is a bivalve mollusc that you find at the beach or growing on rocks. The meat is harvested and eaten in restaurants. It is covered in what looks like hairs but when we look at it under the microscope, they don’t look like hairs at all. What we are wondering is:
Are the ‘hairs’ produced by the mussel or is it something else growing on the shell? If it is something else growing on the shell, why doesn’t that plant or animal grow on the shells of other molluscs?
What are the white things that appear to be growing on the ‘hairs’ of the mollusc?
- This is what they look like with a higher magnification
- Where the hairs connect to the mussel shell












