If you answered Jupiter .. you’re *probably* correct but only because we’re nowhere near finding them all. However the current “king of the moons” appears to be Saturn right now.
Recently using out increasingly more powerful arsenal of ground based telescopes, Saturn’s total moon count was increased to a whopping 82. Yeh, us backyard photographers will struggle to get close to that in our exposures!
Jupiter on the other hand also had it’s moon count increased to 79, so the king of the planets isn’t exactly lacking in moons and doesn’t have far to catch up!