Video of a 16-month-old baby swimming in a pool seemingly unattended is stirring controversy.
Adam Christensen posted the video of his daughter, Elizabeth, online.
She was trained by a professional instructor, but some parents are chiming in, questioning whether it is safe.
Christensen spoke to CNN and said safety is always his first priority.
"When I first watched her in there, every time she went face down I was like 'oh my goodness, she can't breathe.' I was just worried to death, but the instructor assured us that she was just fine," he said. "We didn't teach her ourselves. We wanted a professional, somebody that was certified to do that, but we still are able to recognize warning signs, when they're fatigued."
Christensen says Elizabeth loves the water.
She swims up to three times a day and can dive under water to pick up toys.