I've consistently run into this information when doing parasite research on the net:

"The fish tapeworm is the largest of the human tapeworms, reaching the length of 33 feet or more. There can be 3,000 to 4,000 segments in one worm. It can produce more than 1,000,000 eggs a day. This type of infestation can cause anemia because of interference with vitamin B12."

Perhaps a cause for concern. Fish tapeworm. Look it up.