The first-ever transmissible cancer to spread among fish in a freshwater setting has been discovered among brown bullhead catfish in Lake Memphremagog. CANNIBALISTIC JELLYFISH ARE INVADING THE PRECIOUS LAGOONS OF VENICE WITH NO WAY OF REMOVING THEMLake Memphremagog is located in both Vermont and Quebec, Canada, and is a glacial lake. This suggested the cancer may be transmissible, spreading between hosts like a contagious parasite. They found evidence to suggest the cancer was indeed transmissible, and the first-known transmissible cancer in fish species as well as in freshwater. HOW TO WATCH FOX WEATHERThe study said future sampling of populations of affected brown bullhead catfish will address the age and origin of this clonal cancer, which is also essential for understanding the evolution and the way it impacts the brown bullhead population.