Upholstered with sponges and corals, the bridge of the U.S. Coast Guard Cutter Duane attracts schools of smallmouth grunts—and divers

Upholstered with sponges and corals, the bridge of the U.S. Coast Guard Cutter Duane attracts schools of smallmouth grunts—and divers

David Doubilet/ National Geographic ©

Upholstered with sponges and corals, the bridge of the U.S. Coast Guard Cutter Duane attracts schools of smallmouth grunts—and divers

Upholstered with sponges and corals, the bridge of the U.S. Coast Guard Cutter Duane attracts schools of smallmouth grunts—and divers

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