Wriggly bait is a type of fishing bait that consists of worms, which are often used to attract fish. It is a popular choice among anglers due to its effectiveness in catching a variety of fish species. The term 'wriggly bait' is derived from the wriggling motion of the worms, which can be seen when they are placed in water. Worms are usually the most common type of wriggly bait, although other types of bait such as maggots and grubs can also be used.