Biofilms are a group of at least one kinds of microorganisms that can develop on a wide range of surfaces. Microorganisms that structure biofilms incorporate microscopic organisms, parasites and protists.

One normal case of a biofilm dental plaque, a foul development of microbes that structures on the surfaces of teeth. Lake filth is another model. Biofilms have been discovered developing on minerals and metals. They have been discovered submerged, underground or more the ground. They can develop on plant tissues and creature tissues, and on embedded clinical gadgets, for example, catheters and pacemakers.

Every one of these unmistakable surfaces has a typical characterizing highlight: they are wet. These situations are "intermittently or persistently suffused with water," as per a 2007 article distributed in Microbe Magazine. Biofilms flourish upon wet or wet surfaces.

Biofilms have set up themselves in such situations for an extremely prolonged stretch of time. Fossil proof of biofilms dates to about 3.25 billion years back, as per a 2004 article distributed in the diary Nature Reviews Microbiology. For instance, biofilms have been found in the 3.2 billion-year-old remote ocean aqueous rocks of the Pilbara Craton in Australia. Comparable biofilms are found in aqueous situations, for example, natural aquifers and remote ocean vents.