Myxococcus xanthus bacteria typically feed on other microbes. Then one of their traditional prey turned on them EYE OF SCIENCE/SCIENCE PHOTO LIBRARY
Two species of bacteria appear to reverse which is predator and which is prey depending on the temperature. Just a small temperature change is enough to cause the switch.
The soil bacteria Myxococcus xanthus is a social species that hunts in packs – it forms temporary, multicellular “swarms” of individuals that chemically tear apart and soak up nutrients from other microbes. And its prey includes Pseudomonas fluorescens, a bacterium common in both soil and water.
