Microcystis aeruginosa immediately intrigued me because I knew I would be able to find it in the La Crosse area. This organism is toxic. It causes algal blooms, but it can also produce a neurotoxins, which affect the brain, and hepatotoxins, which affect the liver. along with algal blooms this bacteria causes diseases in fish. Although little is advertised about the dangers, there have been efforts made. Swimming in an area where this bacteria is present can cause skin irritation. Pay attention to algal blooms as they can be an indicator of this bacteria. Take caution to signs, and make yourself aware of where pets swim as it can also affect them.