Kreece Ocean
Don't go into the water. I mean it. This ocean is teeming with life at the very bottom where it is warmed by the heat from the thin mechanical layer, but a lot of this life is aggressive (although there are some cute fish). It only gets worse as you go up... Most people would have to travel using submarines which nevertheless cannot protect from some of the larger creatures lurking in the murky depths. Those naturalised to the sea would have better luck. There are small settlements out here specifically for sea-dwellers which offer good protection from the dangers.
