They'll discard the tail and secrete a slime layer which is how they attach to the plastic.
它们会丢弃尾巴，分泌黏液层，这就是它们附着在塑料上的方式。
英语百科
Slime layer
A slime layer in bacteria is an easily removable (e.g. by centrifugation), unorganized layer of extracellular material that surrounds bacteria cells. Specifically, this consists mostly of exopolysaccharides, glycoproteins, and glycolipids.
The slime layer is not to be confused with the S-layer, a separate and highly organised glycoprotein layer surrounding many bacterial cells.