n a virus that is parasitic (reproduces itself) in bacteria
phage uses the bacterium's machinery and energy to produce more phage until the bacterium is destroyed and phage is released to invade surrounding bacteria
Last week Bacteriologist Albert Paul Krueger of the University of California elaborated a recent announcement of a discovery concerning bacteriophage, the mysterious bacteria .
He called this something a phage.
If the phage destroyed bacteria in aquarium water.