👉 Microfauna, also known as microorganisms or small organisms, is a group of living organisms that are less than 0.1 millimeters in size and typically found in environments with very low light levels, such as the ocean, soil, and even the air. These organisms include bacteria, fungi, viruses, protozoa, and other small-lived organisms. Microfauna can be classified into different types based on their characteristics, including but not limited to, photosynthetic organisms, ana