Use these to purchase goods at the Salvage Shop.
How to get
You can collect clamshells as Seal Dive rewards from your own dives, or helping friends' dive. You may also receive them when friends help your dive.
Use these clamshells to buy special items at the Salvage Shop.
Collecting Royal Clamshells
You can collect a maximum of 400 during dive events. Note that it *is* possible to collect more than this in cases where you have less than 400 when you collect a dive/helper reward. However, while you have 400 or more you will no longer receive as dive rewards.