11.   Unfortunately, even nontoxic blooms can kill marine animals by depleting oxygen in the water.

12.   When bacteria begin decomposing the dead algae, they deplete the oxygen from the ocean bottom, sometimes to the point where none is left.

13.   When the algae die and decompose, the process depletes the oxygen, leaving an inadequate supply to support fish and other aquatic life.

14.   When oxygen is depleted, fish and other aquatic life are choked.

15.   The tiny plants deplete oxygen in the water.

16.   The red tide depletes oxygen in marine habitats, killing massive populations of fish, shrimp and other shellfish.