Bluegreen algae is a very diverse group. Many are not harmful, do not cause blooms, and go unnoticed. Most if not all bluegreens do contain a the bluish pigment that is more visible when the green chlorophyll pigment breaks down when they are decomposing. The blueish color is not readily apparent unless they are abundant and gathered together. Here is a pretty good layman's explanation of how Cyanobacteria relate to pond/lake management:
http://www.ecy.wa.gov/programs/wq/plants/algae/publichealth/GeneralCyanobacteria.htmlSearch engines also have a hard time distinguishing between psychologist and phycologist since many people spell them wrong and read them wrong.
