Yet across thousands of acres there, all-important underwater grass habitats have exploded in recent years to levels not seen in half a century.
Downstream, throughout much of the bay's main stem, excessive pollution levels have held fairly steady during recent decades.
Yet deepwater "dead zones," massive volumes of water with too little oxygen for aquatic life, have steadily worsened and expanded there.
And another wrinkle: Just in the last couple years there are tantalizing...
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