Quite a simple QoL suggestion - allow players to trade with harbor operators (from land and sea). Simply as a means of selling loot from sea to harbor operators on sea havens. They don’t need to sell anything, though they could sell Corals to make sea farming a bit more consistent.
This would also allow players leveling in isles to sell loot to NPCs in that map directly instead of having to go back to town.
This would also allow players leveling in isles to sell loot to NPCs in that map directly instead of having to go back to town.