|Region||Golden Apple Archipelago|
A plant species that only grows in certain regions and islands of the ocean. Though it looks like a fungus of some sort, it actually comes from a substance secreted by certain soft-bodied organisms.
If leaks regarding Kaedehara Kazuha is right, Sea Ganoderma is one of Inazuma local specialties and will be used as character ascension material for upcoming characters from Inazuma:
Sea Ganoderma Location in Golden Apple Archipelago
For now Sea Ganoderma can only be obtained from Golden Apple Archipelago during version 1.6. Most likely in the next update, Sea Ganoderma will be available in the Inazuma region,