I basically made a fish market. It requires the harbor to be built, sea navigation tech for each race, and a level 2 city. It is not bound to the beach tile so it can be built in the city.
It costs 25 gildar, 25 materials, and takes 8 turns to build. It provides 4 gildar and 4 food per turn.
I basically wanted to add some incentive to building a harbor as their function is limited right now.
https://www.wincustomize.com/explore/elemental_war_of_magic/4/
Unzip the files in the 'my games/elemental' folder
I based this mod off of Carlzilla's Fishery Mod. Thanks Carlzilla for a great idea, pasha_bigdog for some pretty code on the city stables mod, and Malloreon for the City Improvement Modding Guide