What is Red Tide?
There are numerous microscopic algae in the ocean and they are essential components to ocean life but when they are supplied with excess nutrients, they multiply uncontrollably, and can become an unwanted toxic mass commonly called a “red tide” or harmful algal blooms. (HAB)
What Causes Red Tide?
This is still being investigated but some marine scientist believe the up welling of nutrients from the sea floor from massive storms is most likely the cause of these events.
Dinoflagellates are major producers of oxygen in the ocean (and freshwater). But some species can grow out of control, causing a red tide.(2004 Smithsonian Institution)For a more detailed and reference filled description of red tide see Wikipedia: