A "bobber" is a type of fishing float used to help anglers detect when a fish is biting. It is typically made of lightweight materials and is designed to float on the water's surface. When a fish takes the bait, the bobber will move or submerge, signaling to the fisherman that it's time to reel in the line. Bobbers come in various shapes and sizes, including round, oval, and pencil styles. They can be used in different fishing environments, such as lakes, rivers, and ponds. Anglers often attach a bobber to their fishing line at a specific depth to keep bait suspended in the water, making it easier to catch fish like bass or trout.