![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Mytilus_with_byssus.jpg/640px-Mytilus_with_byssus.jpg&w=640&q=50)
Byssus
Fibre secreted by some molluscs / From Wikipedia, the free encyclopedia
A byssus (/ˈbɪsəs/) is a bundle of filaments secreted by many species of bivalve mollusc that function to attach the mollusc to a solid surface. Species from several families of clams have a byssus, including pen shells (Pinnidae), true mussels (Mytilidae), and Dreissenidae.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Mytilus_with_byssus.jpg/640px-Mytilus_with_byssus.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/3/35/Zebra_mussel_GLERL_1.jpg/640px-Zebra_mussel_GLERL_1.jpg)