Discovery Channel’s “Shark Week” kicks off with a unique twist this year: “Dancing with Sharks.” Hosted by former “Dancing With the Stars” host Tom Bergeron, the show features scuba-diving shark handlers performing underwater dances with hammerhead sharks. The weeklong programming also includes shows on shark attacks, mysterious shark species and even a “Great White Sex Battle.” Discovery emphasizes both entertainment and education, blending shark facts with dramatic titles like “Frankenshark.” Born as a counterpoint to the fear sparked by “Jaws,” “Shark Week” celebrates sharks as fascinating predators while promoting their ecological importance. Bergeron calls it both thrilling and educational.