There are a few different liquids in Core Keeper, most of them unique to a single biome. Liquids fall into two categories: water and lava. Each liquid has different properties, catchable fish or objects and sprites. Each liquid also has a priority key, determining which liquids will overtake others. Liquids with higher priority will convert existing liquids to itself.
Liquids can be picked up and moved using a Bucket.
Bridges are placeable on top of any liquid. Liquids can flow and overtake other liquids under any bridge. If lava comes in contact with water, the created lava rock ground will replace the existing bridge. Glowing liquids will also shine their light through any bridges placed on top.