Sea Bounties are a collectable item registered in your Collectables window (Alt + L).
There are currently 44 Sea Bounties in total on EU/NA
In addition, each Sea Bounty you collect gives you resistance points for your ship.
Sea Bounties will be available in your inventory as a Secret Map
After going to the location on the map and obtaining the Sea Bounty collectable, you must go to Peyto or Crade of Fermanta and speak to the [Exchange Sea Bounty] NPC to claim the Collection Rewards.This NPC can be found on the ship deck (floor 3).