The large patches of brown water seen here in the Lafayette River in Norfolk, Va., is an algal bloom, or "mahogany tide," during July of 2015. Such blooms are the result of excess water pollution and warm weather, which combine to over-stimulate the growth of naturally occurring algae. Algal blooms stain the water, block sunlight needed by underwater grasses, and suck oxygen from the water, creating "dead zones" where fish, crabs, and oysters struggle to survive. The key to preventing algal bloo

Environment Minister Lucy Hood and SA Health's Dr Chris Lease are providing an update on South Australia's algal bloom. | 7NEWS Adelaide

Scientists investigating the state's algal bloom have made a key discovery that could have major implications for the summer ahead. #9News | 9 News Adelaide

Fishing will soon be banned or heavily restricted across huge parts of South Australia as the algal bloom takes a devastating toll. Fish and seafood stocks have plummeted, leaving authorities with no choice but to take drastic action and fast. Download the 7NEWS app: https://7news.link/7NEWSapp #7NEWS | 7NEWS Adelaide