What is "mercuria"

Mercuria is a genus of small brackish water snails or freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Hydrobiidae.

Mercuria may refer to:

• Latin name for Herma
• Mercuria (Dungeons & Dragons), the second layer of Mount Celestia in Dungeons & Dragons
• Mercuria Energy Trading
• Mercuria (gastropod), a genus of gastropods in the family Hydrobiidae