Fifty years ago, “Jaws” unlocked dread in millions about man-eating sharks. This summer, that fear may be somewhat reduced as they become contestants on a TV dance show. Former “Dancing With the Stars” host Tom Bergeron steps up for a marketing masterstroke by Discovery Channel’s “Shark Week” — “Dancing with Sharks,

After nearly 15 years co-hosting ABC’s “Dancing With the Stars,” veteran TV personality Tom Bergeron felt like he was done working on a weekly series. However, he didn’t want to “disappear into the hinterlands,