👉 Tetracocci is a term used in microbiology to describe a type of bacteria that are capable of forming colonies on agar and can be distinguished from other types of bacteria by their unique appearance. These bacteria are known for their ability to form colonies on agar, which allows them to grow in large numbers without the need for oxygen. Tetracocci are also characterized by their ability to survive in extreme environments such as the ocean or in the presence of antibiotics.