What it is
A worm is the oldest honest bait in the bag. Chopped, whole, or a head on a hook, it catches perch by design and bream, tench, chub and carp by appetite. Dendrobaenas are the usual shop worm; lobs are the garden prize; redworms are a neat hookbait for shy fish.
Chopped worm in a feeder or a pot pulls fish. A whole worm on a light float is still how big perch get caught. Carry forceps.