'Rare' contagious cancer found in fish from Quebec and U.S. lakes

Scientists have discovered a rare contagious cancer spreading among catfish in Quebec and parts of the northeastern U.S. This genetic study reveals that melanoma skin cancer tumors can transfer from one fish to another, a phenomenon usually unheard of in the animal kingdom. This finding not only highlights an unusual aspect of disease transmission but also underscores the potential ecological impacts on fish populations. It's a stark reminder of the often unseen threats lurking in our natural environments.