Miles Teller -- Girlfriend Says Pregnant Woman Saved HIM!!!

Miles Teller did not rescue a pregnant woman caught in a Miami riptide -- it was the pregnant woman who gave Miles a heads up ... jaws was lurking in the water.

Model Keleigh Sperry, who was spending a fun-filled day in the sun with the "Whiplash" star, says the pregnant woman came up to them "freaking out" that a shark was in the water. And the woman had a toddler on her back to boot.

Nonetheless, you can see from the pic Miles helped the very pregnant lady out of the water and harm's way.

He's awesome, and the shark didn't bite anyone.