1. Vogesella indigofera, obtained from a pond brimming with highly toxic waste.

2. Pseudomonas aeruginosa, an opportunistic pathogen that can also be used in the bioremediation of oil spills.

3. A battle between Serratia marcescens (red) and the common soil bacterium, Bacillus mycoides (white). The Serratia seems to produce an antibiotic to protect itself from the invading Bacillus strain.