When used on a hook, baits increase the chance of catching a particular fish. There are 12 types of bait:
[[Fly ]] - You catch these using a pottery jar with a bit of honey in it, on animals that require grooming. [[Cheese Piece ]] - Cheese Broken into smaller pieces. [[Dough Ball ]] - a small ball of dough. [[Wurm ]] - Found on dirt and mycelium tiles. [[Sardines ]] - Caught using fishing nets in shallows.
[[Roach]] - Caught in shallow waters.
[[Perch]] - Caught in shallow waters.
[[Minnow ]] - Caught in caves. [[Fish Bait ]] - Small fish chopped up.
[[Grub]] - Found in shrivelled trees, prised out using an awl.
[[Wheat Grain ]] - from wheat! [[Corn Kernel ]] - from corn.
Each time a fish bites on a baited line, the bait will take damage (e.g. the fish eats a bit of it). Bait is not required to catch fish (i.e. you can catch fish without bait), but the chances are a lot lower. Different fish prefer different bait.