The shadows will vary in size to indicate the size of the fish. Finding FishĪs you move around your island, you’ll notice shadows in the water. If you already know the basics of fishing and just want information on the Cast Master objective, skip ahead. Follow these tips and before you know it, you’ll be a Cast Master! Since the game doesn’t really explain how to catch fish, it was a bit frustrating at first. Bugs, for the most part, are pretty straightforward, but catching fish can be trickier. Catching critters is a big part of Animal Crossing: New Horizons.