What is Byssus?
[[Image:Pinna noblis shell & byssus.JPG|thumb|200px|''[[Pinna nobilis]]'' shell and byssus]] '''Byssus''' is a [[silk]]like ''filament'' by which certain [[mollusc]]s attach to hard [[substrate|surfaces]]. It also means a rare [[fabric]]. It is also called [[sea silk]], and is its [[fibre]] [[source]]. {{biology-stub}} [[Category:Bivalves]]