New Theory on the Lake Champlain Monster?

Is the Lake Champlain monster a mutation?

Lake Champlain is a  freshwater lake in North America mainly within  the United States  but partially situated across the Canada/U.S.A border, in  Quebec. The lake over 100 miles long and  14 miles wide at the widest point. The  depth is approximately 400 feet .

In 1609, Samuel de Champlain wrote that he saw a lake monster five feet long and as thick as a man's thigh, with silver-gray scales a dagger could not penetrate. The creature had jaws over two feet long with sharp teeth. Native Americans said there is a history of a creature up to ten feet long seen by many over the years .

A famous  photo was taken by Sandra Mansi, whose family encountered the beast, named "Champ",  on Tuesday, July 5, 1977. Some claim it is simply photo of a man swimming, others a long necked unknown  creature.
A review of some sightings here:
https://cryptozoo-oscity.blogspot.com/2013/12/review-of-some-champ-sightings.html

There is a list of sightings and some information here:

https://www.lakechamplainregion.com/heritage/champ

This story appeared a few days ago:

https://eu.usatoday.com/story/news/nation/2019/08/22/fish-two-mouths-caught-lake-champlain-new-york/2083144001/

A fish with two lower mandibles ,so two mouthed , was caught in Lake Champlain. It was some sort of genetic mutation but whether it was caused by pollution is unknown. This however begs the question could Champ, the lake monster, be a mutation ?  It could explain its large size and appearance.