An expansive body of water and slime compound that's not fit for swimming, let alone drinking.
The Slime Sea that covers most of the Far, Far Range is something of a mystery. It is seemingly a mixture of water and slime that is believed to be the primordial pool where all slimes emerged, though its true purpose is entirely unknown by even the most esteemed slime scientists.
What is known is that the liquid found within the Slime Sea is not fit for drinking, watering crops, or even swimming, as most things seem to quickly sink to the bottom. When a slime enters the slime sea it quickly vanishes but it is widely believed that this far from ends the slime's existence, for slimes that enter the sea can often be seen quickly returning back on land, happy as ever. In fact, many slime scientists believe that slimes use the sea as a means of transportation, moving swiftly below the surface and popping out on land wherever they see fit.
But all theories aside, one fact remains very clear, most especially to ranchers: don't enter the Slime Sea!