A father and his 15-year-old son drowned on Christmas day during a cave dive in north Florida. The two were reportedly testing new diving equipment the 15-year-old had received that morning as a Christmas gift.

The bodies of Darrin Spivey, 35, and Dillon Sanchez, 15, were found Wednesday night at 8:30 p.m., roughly five hours after Spivey's fiancee called police because she couldn't reach the two by phone. "I called friends and family that were more experienced to ask if I should be worried, and then I made the call," she told ABC News.

Spivey was an experienced and certified diver, but reportedly was not certified for cave diving. Sanchez was not certified to dive at all.

Divers discovered Sanchez's body in a cave 67 feet beneath the surface at Eagle's Nest Sink, which is considered the "Grand Canyon" of cave diving; Spivey's body was found at 127 feet.