His wife, Jeanette Mundus, said he had a history of heart disease. Frank suffered his first heart attack in 1998 and shortly after received a quadruple bypass.
He began his career in the early 50s as a fearless fisherman, hunting down sharks in Montauk, in Long Island, NY.
In 1964, he caught a 4,500-pound great white shark by harpoon and was dubbed the “Monster Man” due to the size of his catches.
This catch helped to inspire the best-selling book turned 1975 blockbuster movie, “Jaws.”
However Mundus said “Jaws” was the “funniest and the stupidest” movie he had ever seen.
And later, in 1986, he caught a 3,427-pound great white shark the old-fashioned way, by rod and reel.
"After you get the fish, you turn around and look at the fish, and you feel sorry for the fish because he's your opponent," Mundus said in an interview with Esquire magazine. "I always feel good that I won, but I feel sorry for the one who lost."
Mundus retired to Hawaii in 1991 after a lifetime of fishing, where he didn't regularly fish for sharks, his wife said.
To learn more about Mundus' career, visit his website.