What shape do spirilla bacteria have?

Spirilla bacteria are recognized by their distinct spiral or corkscrew shape, which is a key characteristic that differentiates them from other types of bacteria. This unique morphology allows spirilla to move in a twisting motion, aiding in their mobility through liquid environments. The spiral structure can be advantageous for colonization and accessing different niches within various environments.

Other bacterial shapes, such as rod-shaped and circular forms, refer to different classifications entirely; rods are known as bacilli, while circular bacteria are termed cocci. Additionally, straight chains describe a filamentoid arrangement seen in some types of bacilli, not in spirilla. Therefore, the correct identification of spirilla as spiral or corkscrew-shaped emphasizes their significant role in microbiology and their classification within the bacterial kingdom.