Fish

Fish is the best food in the game, but also the most involved. In order to fish, you need the fishing pole and worms.

Fishing Pole
The fishing pole is crafted at the workbench. It requires Level 2 hammer.

Worms
At some point in the game, you will come across a small bush. It might be sometime after you chop down a tree. With a trowel, you can dig for worms here.

Fishing for Fish
Once you have the fishing pole and the worms, you can go to the pond and fish. Remember to have a slot open in your bag, to hold the fish. When you fish, a transparent fish will appear above a sliding progress-like bar. The goal is to keep the needle underneath the fish, using the space bar. As you line up the needle with the fish, the fish starts turning opaque. At some point, you bag it. Unlike the other harvesting mechanisms, once you bag a fish, the interface will drop you out and you have to press 1 again to keep fishing.