Pseudomonas peli is a Gram-negative, non-fluorescent, non-sporulating, motile, rod-shaped bacterium isolated from a commercially available nitrifying inoculum used in aquaculture. The type strain is LMG 23201. After approximately 24 hours of growth at 28 ðC in Tryptic Soy Agar medium, Pseudomonas peli colonies are 1âÂÂ2 mm in diameter, beige to yellow in color and have non-uniform edges while the cells themselves are rod shaped (width near 1üm and length between 2-3 üm) with rounded ends. Cells are motile, do not form spores, are non-fluorescent and they have not been observed to grow anaerobically.