Red tides, which are massive algal blooms, can block sunlight from reaching the sea floor and release toxins into the water and air.
Seagrass 101: Understanding the Problem - Florida Sportsman
Our Fight - Captains For Clean Water
Florida's red tide is decimating marine plants - EHN
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Florida's Red Tides Are Getting Worse and May Be Hard to Control
Red tide: Guide to Florida toxic algae blooms
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Red Tide Is Devastating Florida's Sea Life. Are Humans to Blame?
Decimated by famine, Florida's manatees face an uncertain future
Florida's Algae Problem: What Is It, And How Can It Affect You