Encrustations, formed from microbes (Bacteria, algae, Fungi, Plankton, or protozoa) embedding in extracellular Polymers, that adhere to surfaces such as Teeth (Dental Deposits); Prostheses and Implant [..]

Films of bacteria or other microbial organisms, usually embedded in extracellular polymers such as implanted medical devices, which adhere to surfaces submerged in, or subjected to, aquatic environmen [..]

A biofilm is a complex aggregation of microorganisms, sometimes bound by a matrix or film. In the case of pathogenic bacteria, this protects the bacteria from antibiotics and from the immune system.

AKA: Microbial mats Layered groups or communities of microbial populations.