http://www.newsweek.com/what-brown-tide-outbreak-red-1090429

The annual outbreak of algae called a brown tide has begun off the coast of western Florida and scientists are hoping it doesn’t meet up with the red tide that they’re already facing.

The brown tide near Florida is made of Trichodesmium, a cyanobacterium, or blue-green algae. The bloom occurs every year in the Gulf of Mexico and has been known to extend so far that’s it’s visible from space.