A sea filled with volcanic vents, because of the volcanic vents the water has turned toxic to drink and feels irritating to touch, the water is also rich in minerals because of the vents thus it needs to be refined and filtered before it can be of use. transport across this dangerous sea is often done by the people of the Cindrisian Archipelago since they rely on frequent travel across it for goods to refine their water so its a dangerous but rewarding task for them