A shark expert, whose own curiosity about these fascinating fish was sparked by the movie "Jaws," explains some of their unique features and the many discoveries made in the decades after its release.

The toothy villain of “Jaws” terrified audiences in 1975. Offscreen, the hit film — which is celebrating its 50th anniversary — impacted sharks in unexpected ways.

"You're gonna need a bigger boat." It's been 50 years since Roy Scheider's Chief Brody uttered that famous line after getting a first glimpse of the deadly shark in Steven Spielberg's "Jaws." The film,