Interesting internet media.

captions are in French and translate loosely to:
"An ancient greek legend recounts that Arion, following a shipwreck, was saved from a shark attack by dolphins"
"Over time many witness accounts have backed up this legend; but no visual proof existed… until this day in June 2003"
(internet media starts)
"Tiger attack on a woman in the Bahamas"
"Tiger shark (~2.5 meters) swims towards the woman"
"5 dolphins form a line facing the pradator"
"The woman isn’t aware of the sharks presence despite the cries of her friends"
"One of the dolphins dives to drive away the shark"
"This animal-human interaction sheds light on dolphin behavior towards humans. In defending the woman, this mammal’s actions seem to suggest that it is endowed with sentiments similar to our own… and confirms Arion’s legend".

Bahamas dolphin shark attack arion plongée sous-marin science requin