The man's pregnant wife jumped in the water to rescue him after the attack, which took place around four miles from land.
Since he was tagged last October, Ironbound has traveled over 2,700 miles.
The shark was tagged in September by researchers from non-profit OCEARCH near Nova Scotia in Canada,
"It is important for everyone to know that their actions on land impact their local reefs onshore: runoff from agriculture and sewage, particularly during storm events, compromise our reefs," an expert told Newsweek.
Hundreds of people in Florida and Cuba witnessed the phenomenon.
Just hours earlier, Trump had answered a question on climate change by downplaying the strength of both Irma and Harvey.
Severe storm damage in the Florida Keys may necessitate the evacuation of an additional 10,000 residents.