Sharkfest - Season 4 Episode 9 World's Biggest Bull Shark?
Overview: In 2012, Dr. Neil Hammerschlag caught a giant bull shark that weighed over 1,000 pounds and measured 10 feet long. The shark was let back into the ocean, but its origins remain mysterious. Some scientists thought the shark was just well-fed, but others believe she may be the matriarch of a special bull shark breed. This special seeks to solve that mystery.