Definition
A 'bacteria species' is the fundamental unit of bacterial classification, representing a distinct and identifiable group of bacteria. Think of it as a specific breed of dog, like a Golden Retriever. It is a population of bacteria that share very similar characteristics and can typically exchange genetic material. Each species has a unique name, consisting of the genus followed by a specific epithet (e.g., *Escherichia coli*). Species are the most specific level of classification, and they are essential for understanding bacterial diversity and function. They play unique roles in the environment.