Bait fish are small fish used to attract larger fish during fishing. Common types of bait fish include minnows, shiners, and sardines. They are often used live or dead to entice predatory fish like bass and trout. These fish are typically found in freshwater and saltwater environments. Fishermen may catch bait fish using nets or traps, or they can purchase them from bait shops. Using the right bait fish can significantly increase the chances of a successful fishing trip.