Speaking of Jupiter, it probably has a mantle of metallic hydrogen, a state of hydrogen where cool stuff happens. It has properties of a metal, like conductance and reflectivity. This lost me a bar trivia game a month ago because I don't think it counts as an 'ocean'. I'm still mad about it.

All of the objects in the solar system orbit in almost the same plane, which is the plane the massive cloud of dust and gas that formed our solar system rotated in. 99.86% of this mass makes up the sun, and of that last 0.14%, Jupiter contains 71% and Saturn 21%.

Jupiter's moon Europa has an icy outer shell and a layer of liquid water, kept warm by the constant squishing motion of the tidal forces from Jupiter. Missions in the form of a submarine probe, tipped with a radioactive heat source to melt through the 3-20 mi crust, have been proposed.