Mon Mar 20, 10:06 AM ET

This June 2004 file photo, provided by the Florida Keys News Bureau, shows kayakers paddling through a mangrove forest near Big Pine Key, Fla., in the lower Florida Keys. Visitors who kayak on Keys shallow waters can enjoy a plethora of flora, fauna and underwater life in the unique ecosystem. (AP Photo/Florida Keys News Bureau, Bob Krist)

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