>> PHOTOS: Great white shark caught, released in Florida

"Then it kind of rolled sideways in the surf and we realized it was a white shark," Smeby said.

The men snapped a few photos of their catch, then tagged and released it, Smeby said.

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The images have been posted on the Facebook page of the Dark Side Sharkers. Smeby, Keeny and Register are members of the group, which focuses on catching, photographing and releasing sharks.

"I feel like we made history the other day," Smeby said. "We talk to everybody from Texas to the southern tip of Florida up the eastern seaboard, and as far as we can tell, it's the only one land-based ever caught in the Gulf of Mexico."