The three lakes and swimming lagoon at the nearby parks are undergoing an algae bloom. The swimming lagoon is closed and the three lakes are posted with warnings about the blue-green algae present. The visitor is cautioned against drinking the water or getting any in your mouth. "Thoroughly rinse off your dog or children after swimming in the water." The notices also add to clean fish completely and "do not eat their entrails." People do that?
To me the water looked to contain more than just blue-green algae in creating these colorful patterns.