To find Sea Ganoderma you must explore the Inazuma region. Since the Golden Apple Archipelago has ended, they have moved to the Inazuma islands.
Local Specialties respawn every two days after looting them; however, this is based on the time you harvested them, not the server reset time.
The two images below show where you can find Sea Ganoderma in Inazuma.
Click on the images to enlarge.
- Type: Local Material
Sea Ganoderma is used for the following Character Ascensions.