millions of fish die, page-14

That is true, Dogby, but the California bloom is an annual springtime occurrence and is postulated to be caused by ocean upwelling bringing nurtrient in and causing the bloom as it hits warmer coastal water. I believe that algal blooms in general are poorly understood.

Here are a few links for previous events:

http://www.sciencedaily.com/releases/2007/04/070427084149.htm
http://www.sciencedaily.com/releases/2008/06/080609103232.htm
http://www.physorg.com/news198943463.html