Image: Fermenters with different yeast types

The image displays four sealed glass fermenters in a clean laboratory, each labeled with a distinct beer yeast type: top-fermenting, bottom-fermenting, hybrid, and wild yeast. Each fermenter has an airlock releasing CO₂. The top-fermenting yeast shows thick foam and krausen on the surface. The bottom-fermenting yeast is clearer with yeast sediment settled at the bottom and minimal surface foam. The hybrid yeast displays moderate foam with some yeast settled below, appearing slightly cloudy. The wild yeast fermenter has a patchy, uneven foam with floating particles and a cloudy, irregular appearance. The background features shelves with laboratory glassware and a microscope, adding to the sterile, professional setting.

The image is related to: Yeast in Homebrewed Beer: Introduction for Beginners