Fishing is a minigame in The Legend of Zelda: Twilight Princess. It is a fun and rewarding way to get food, rupees, and other items. To fish, you will need a fishing rod, which can be purchased from the fishing hole in Kakariko Village.
Once you have a fishing rod, you can start fishing in any body of water. To do this, simply equip the fishing rod and press the A button. Link will then cast his line into the water. You will need to wait patiently for a fish to bite. When a fish bites, you will need to press the A button again to reel it in.