From an AP story by Danica Coto headlined “Dog vs shark standoff thrills tourists on Bahamas boat tour”:

The sight of a massive hammerhead shark was a rare treat for 32 travelers on a tour boat in the Bahamas. But then, something stranger still: A dog dove from a nearby dock to confront the sea creature.

Tourists aboard the four-hour excursion can be heard shouting and pleading with the dog to turn back. “Get out baby!” and “Stop going after it!”