Large Seashell (Shimmering)
Location
At the Temple of the Moon Goddess behind a closed door, here.
General Properties
ClassificationLiving and Dead
Animals
Animals
Field Properties
Movable✗
Blocking✓
Utility Properties
Usable✓
Other Properties
Version12.90.12182
July 18, 2022
Summer Update 2022
July 18, 2022
Summer Update 2022
Notes
After its pearl is removed, it looks like this: 
You can get a Shimmering Pearl from it if you have the corresponding mission open of the Within the Tides Quest, but the pearl is not required for the quest.