There are many unverified reports of large tapeworms. One of the longest tape worms taken out of a human body was over 108 feet in length. On average, tape worms are found to be at most 50 feet.
Tapeworms can come from several different sources, such as pigs, fish and beef. It is estimated that over 20 million people worldwide are infected with a tapeworm. The largest variant of tapeworms can be found in whales and is, on average, over 100 feet in length. Tapeworms grow segments that contain a digestive system as well as a reproductive system. The last segment of a tapeworm only contains a reproductive system. It is this last segment that splits off in feces and carries the tapeworm eggs that infect other creatures.