Mario Gabelli’s “Operation Fishbowl,” his recently teased inquiry into the particulars of the Paramount deal, is officially underway—heralded recently by his modest Twitter campaign and a letter to Delaware Chancery Court. It’s not a full-blown lawsuit, at least not yet. For now, the octogenarian money manager, who, like me, is a graduate of Columbia Business School—Gabelli ’67; Cohan ’87—is on the hunt for information about the deal Shari Redstone cut with Skydance’s David Ellison and RedBird Capital’s Gerry Cardinale for National Amusements Inc., her family’s holding company that controls 77 percent of the voting shares of Paramount Global. Gabelli’s request is reasonable. After all, he is a fiduciary for 4.9 million of those Class A voting shares, making him the largest non-Redstone holder, and so he wants to know specifically what Ellison/RedBird is paying her for her A shares. According to Gabelli, he and the 690 clients whose money he manages own 53 percent of the 9.2 million A shares that the Redstone family does not own. (Gabelli also owns 921,000 nonvoting B shares in Paramount.)