07/02/2005: Makes you wonder if the guy who named this was color-blind....
Here's a flickr picture of a "red tide" in La Jolla, CA. And yes, the "red tide" is that florescent blue patch at the lower right (mouse over the area and a pop-up "label" will tell you...).
Credit: Josh Schulz
Len on 07.02.05 @ 07:15 PM CST