Please note that some information on this wiki is still based on the demo version.
If you notice any errors, feel free to correct them.
Fish
From Super Fantasy Kingdom Official Wiki
Fish is a Resource in Super Fantasy Kingdom used as Food for Units.
Collecting
Fish can be caught from the sea when a Worker is assigned to the 
Port.
Starting fish can also be purchased on the 
Human Kingdom Map for 
coins.
Source
Depletable
