Every day, Captain Seaport will provide you with a set of tasks. If you complete them, he will give you a reward.

Difficulty and reward depend on player's level.

Task Count Options
Use sailors units
Cargo from ship units Coin Fish Wood Stone Iron
Collect Floating Barrels units
Finish production times Wood Stone Iron
Collect Shipwrecks times
Send to Destination times Market Town Small Town Coastline Gulf Bamboo Cave Blacksmith
Finish Social Contracts units