text:  Massive blooms of some types of algae, on the other hand, can stain the water brown or red. They may use up much of the oxygen in the water, turning a region into a dead zone where not many other organisms can live. They can also produce toxins that make shellfish dangerous to eat. So tracking the blooms, by looking for their colors from space, can help keep people safe. For the University of Texas Marine Science Institute at Port Aransas,