Tatyana Allen glanced around for a weapon when she got into a fight with her boyfriend on Daytona Beach around 4:30 p.m. Monday.
Unable to find a suitable weapon, the 18-year-old picked up her 6-month-old baby and used it to beat her boyfriend.
The first-time mother and her boyfriend were on the beach celebrating the 4th of July holiday when they got into it.
Beach patrol officers broke up the fight.
The infant was evaluated at a local hospital for minor injuries and is expected to be okay, according to Click Orlando.
Allen, of Orange County, faces charges of aggravated battery and infliction of physical and mental injury to a child.
She is being held without bail, according to Click Orlando.