Creaturehood in Biofilm

[Don Schaeffer]

https://www.youtube.com/watch?v=KAUcleLkrBc&t=2s
This is an exploration of creatures that life inside
a biofilm. The medium of a biofilm is viscus like mucous
but some creatures live under the surface.
Searching for this life in biofilm requires
a lot of active focus and manipulation of illumination.