I ran across this article today about how moons might have moons. In Daniel Keys Moran's universe, an Earth-sized planet named November orbits a gas giant named Prometheus. November is inhabited, colonized by humans.
... The next time humans will make an attempt similar to this one is in the mid-twenty-second century Gregorian, a world that orbits a barely subsolar planet named Prometheus.
The world is November.
Would a water-bearing, Earth-sized moon orbiting a super-Jovian gas giant have tides from the pull of the parent planet, or would a moon be necessary to make that happen?