Marine Bacteria of the Northern Pacific Ocean the Temperature Range of Growth

The temperature range of growth of certain marine bacteria varied considerably, being from as small as 15° to as great as 50 °C. The lowest temperature of growth was −7.5° and the highest was 45°. All the organisms grew at 0° except four. The optimum was generally from 20° to 25°, but there were many exceptions, some growing best at 37°, and one growing equally well from 20° to 42.5°.