Directed by Kimble Rendall, Bait (2012) stars Xavier Samuel, Sharni Vinson, Phoebe Tonkin and Julian McMahon. The film follows a group of survivors trapped inside a flooded supermarket after a tsunami strikes a coastal town. As they struggle to escape, they discover that great white sharks are swimming through the submerged building.

Från IMDB:
A freak tsunami traps shoppers at a coastal Australian supermarket inside the building - along with 12-foot Great White Sharks.