The captain, Chip Michalove, tagged the shark with an acoustic tracking device and took a DNA sample before letting her go, according to a post on Facebook.
"We weren't exactly sure how big she was, initially, but after a 2 minute blistering run, she jumped completely out of the water, I wish I had a shot of that," Michalove wrote on Facebook.
"Oh man, it was unbelievable," Troy Bowman, a math teacher who had chartered the boat for a fishing expedition, told the the Post and Courier. "It was like you'd seen an elephant out there. So big."
Capt. Chip Michalove / Outcast Sport Fishing
By that time, Michalove had only the light from an iPhone to guide him as he removed the hook from the shark.
"She was still pretty squirrelly. She still meant business, even at that time," Michalove said.
Michalove has gained local fame in the last year for his success with great whites, having hooked five sharks this winter and bringing in three – always for scientific purposes, according to The State.
"The more we study, the more we learn," he said on Facebook. "Nothing illegal was done, and the shark is now going to give us lots of data…so no hate mail."