walleye parasites

[995jim]

hello, what is the white string like parasite worm that I have in a few walleye that seem to be floating in the cooler? Is there a specific bases for these such as water temp, depth etc, environmental? are they only found in a certain part of the fish? Any other info would be appreciated.
thanks jim

[Southern OH Percid angler]

They're tape worms. They can be in any fish anywhere. Just cook your walleye and you'll be fine.