At least one person from the boat was pulled to safety.
A GoFundMe page created to help the family said Stefanie and her sister, Brooke Schaffer, were traveling on vacation with Stacey and their stepfather, Paul Bender.
One of the injured, Stefanie Schaffer, a ballet dancer from Rutland, Vt., was so badly hurt that doctors were forced to amputate both her legs, ABC reported.
"She was an unbelievable mother, an incredible daughter", relatives attending the vigil said to the crowd.
He was among four Americans airlifted to hospital in Florida, the US Coast Guard said. Luckily, Paul and Brooke minor injuries, including bruises and cuts.
French gangster flees prison in helicopter escape, is he in Israel?
A auto abandoned by Redoine Faid in a shopping mall in Aulnay-sous-Bois, north of Paris , after his escape in the helicopter. A notorious French criminal serving 25 years for murder used a helicopter to escape from a prison near Paris .
The explosion happened at 11 a.m. near Exuma, 12 people were on board at the time. "I'm a descendant of Wakanda I was here", she said, referring to the fictional African utopia in the movie Black Panther.
Stefanie's family members spoke to reporters, saying they were heartbroken by the tragedy, and can't imagine how the girl will feel when she wakes up to realize her legs are gone. "She's going to wake up from this coma and realize, 'I don't have legs.' It's breaking my heart".
Authorities are investigating the cause of the explosion.
Despite the shock and sadness, Maleka and Tiran Jackson's friends say they want the world to know about this fantastic couple.