Transcript for World's Premiere Freediver Vanishes During Latest Dive
We'll turn to the disappearance of one of the world's greatest extreme athletes. Natalia molchanova considered the best free diver ever vanished during a dive on Sunday off one of the world's pose vacation spots. ABC's Matt Gutman has the story. Reporter: This morning a search for a champion diver seemingly vanished without a trace into the depths below. Natalia molchanova regarded by many as one of the greatest ever in the sport of free diving. Three, two, one. Capable of holding her breath for nine minutes. According to a post, she was diving off the coast of Spain when she was separated from her peers. And supposedly got into strong underwater current. After two days of searching, still no sign. Her son telling "The New York times" it was unlikely she'd be found alive. Go. Reporter: While increasingly popular, free diving is also considered one of the deadliest extreme sports. Pushing participants' bodies to the very limit. That difficulty something I learned a little about in the cayman islands when I was taught how to hold my breath for as long as free divers. Those con vulthss you see. My body demanding to breathe. Breathe, breathe. Good job, man. Whoo. All right. Good solid five minutes on the dot. Reporter: This is not the first tragedy to rock the sport. American free diver Nicholas movoli losing consciousness after completing a 236-foot dive off the coast of the Bahamas two years ago. He would never regain it. Never take a dive for granted. You don't know what -- you don't know what dive is going to be your last. Reporter: Now another potential loss raising concerns about the dangers of diving deep. For "Good morning America," Matt Gutman, ABC news, Los Angeles.
This transcript has been automatically generated and may not be 100% accurate.