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.
England fans went insane over the penalty shootout win against Colombia
Neither team could find an advantage in extra-time and so a bad-tempered match went to a nail-biting penalty shoot-out. Pickford then threw out a hand to prevent Bacca from scoring and Dier made no mistake to secure England's progress.
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.