These non-pathogenic bacteria glow in the dark. Use Sea Water Agar to attempt to isolate these organisms from fresh sea water. They grow best at about 20 to 25oC. Make a dark chamber from an old cardboard box with the inside painted black. Make two eye-holes. Place a culture of P. phosphoreum inside and see if it glows.
Paramecium are protozoa, single celled animals.
These are then different from the bacteria above. The Paramecium are much larger, feeding on bacteria, and are eukaryotes. Try to isolate Paramecium from pond water. Grow in Lettuce Media at room temperature for at least 7 days. Try using the anaerobic chamber to see if they are able to grow without oxygen.