"In our new study, we discovered more than 20,000 in a single liter (approximately one quart) of seawater, having expected just 1,000 to 3,000. The number of different kinds of bacteria in the oceans could eclipse five to 10 million," he added.
http://www.upi.com/NewsTrack/view.php?StoryID=20060801-113347-3411r
http://www.upi.com/NewsTrack/view.php?StoryID=20060801-113347-3411r