Red Tides

Red tides are also known as  algal blooms - sudden influxes of massive amounts of colored single-cell algae  that can convert entire areas of an ocean or beach into a blood red color. While  some of these can be relatively harmless, others can be harbingers of deadly  toxins that cause the deaths of fish, birds and marine mammals. In some cases,  even humans have been harmed by red tides though no human exposure are known to  have been fatal. While they can be fatal, the constituent phytoplankton in ride  tides are not harmful in small numbers.

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