Adrin Simancas, 24, was on an inflatable raft off the coast of Punta Arenas when a humpback whale emerged and trapped him in its mouth for a few seconds.
The 24-year-old's dad Adrin was filming and managed to capture the once-in-a-lifetime incident.
However, some online commentators have questioned the authenticity of the footage claiming the video has been digitally altered.
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