This February 2013 image shows the view through a glass-bottomed boat hovering over the coral reef off the Florida Keys. The boats take tourists from John Pennekamp Coral Reef State Park in Key Largo,... more 
This February 2013 image shows the view through a glass-bottomed boat hovering over the coral reef off the Florida Keys. The boats take tourists from John Pennekamp Coral Reef State Park in Key Largo, Fla., out to the reef, where sharks, stingrays and smaller tropical fish are often visible. (AP Photo/Beth J. Harpaz) less 
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Associated Press | Photo By Beth J. Harpaz
Wed, Mar 5, 2014 1:03 PM EST