There are plenty of monstrous boats in Marina del Rey. But when a 290-foot, $150 million superyacht arrives with its name covered, people tend to notice. That’s what happened this week when Samsara , the luxury yacht reportedly owned by Harry Potter author J.K. Rowling, pulled into the Los Angeles harbor. The vessel’s identifying name was concealed, but the disguise didn’t last long. Locals and boat-watchers quickly identified the Oceanco-built yacht, with one marina resident reportedly calling it “the worst-kept secret on the marina Take a look below. Built in the Netherlands and delivered in 2015, the 290-foot yacht was originally named Infinity and commissioned for Harbor Freight founder Eric Smidt. After a subsequent stint with Australian billionaire Brett Blundy, it reportedly changed hands again in 2023, when Rowling acquired it and renamed it Samsara —a Sanskrit term associated with the cycle of birth, death and rebirth. And this is no ordinary floating condo.…