Mikroscope Images 1
These objects are made from dried biofilm from which even small filaments grow out.
Acid-resistant biofilm with short outgrowing filaments (streamers)
On the left picture you can see a blue biofilm mass and a blue produced filament.
In the middle, the same process with red fibers and in the right image you can see a white filament.
Depending on the UV-radiation, different colors are produced (melanin-related color production)
Filaments (streamers) that grow out of a circular, dried biofilm
All these small holes have been created by outgrowing filaments breaking through the dry biofilm mass
Close-up of biofilm extensions (streamers) that grow out of the old biofilm mass
Bacterial biofilms that produce circles or coil shapes are scientifically well known