This page of our guide to Dragon Ball Z: Kakarot has information about hunting and fishing.
Hunting in Dragon Ball Z: Kakarot is very simple. You only need to approach the selected animal and press the appropriate button.
Most animals will just run away from you, so the only requirement is to chase them to get their meat.
To kill a dinosaur, you must first attack it. Deplete its HP bar and then approach to collect the items that fell out of it.
You can only catch fish in designated areas.
Before you start fishing, you can choose the bait. It can be purchased or found in the game world.
Fishing is about pressing the corresponding button at the right moment and then hitting the fish. This is how you get food.
Campfires can be found in all parts of the world. Thanks to them, you can cook meat to restore your health or strengthen your statistics.