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Coral coring in Dry Tortugas National Park

By St. Petersburg Coastal and Marine Science Center 2015 (approx.)
A diver takes a core sample from a massive brain coral (Diploria strigosa) in Dry Tortugas National Park
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Detailed Description

A diver uses an underwater drill to take a core sample from a massive brain coral (Diploria strigosa) in Dry Tortugas National Park. 

Sources/Usage

Public Domain.