Red tides, which are massive algal blooms, can block sunlight from reaching the sea floor and release toxins into the water and air.
Red Tide Is Devastating Florida's Sea Life. Are Humans to Blame?
Red tide continues from Captiva south to Marco - Bonita Springs
Florida's Algae Problem: What Is It, And How Can It Affect You
Florida red tide: What is it and where is right now?
The Whale Graveyard Whodunit
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New gallery exhibit highlights red tide, blue-green algae issues
Deep doodoo: Diver's-eye view of a Florida problem
Florida's red tide is decimating marine plants - EHN