Big Shark is a 2023 American comedy horror action film written, directed and produced by Tommy Wiseau, and starring Wiseau, Isaiah LaBorde and Mark Valeriano as three firefighters who must save New Orleans from a killer shark.

The film had its world pre-premiere on April 2, 2023, at Cinema 21 in Portland, Oregon, and was taken on a limited US roadshow to New Orleans, San Francisco, Los Angeles, San Diego and New York City, and internationally to London, UK. The film had its official final cut world premiere on March 16, 2024, at Cinema 21 in Portland, Oregon.