It's only the fourth known contagious cancer found in animals, but others may remain undetected.

For more than a decade, there's been something fishy going on in a lake that straddles Vermont and the province of Quebec. It involves cancer, a kind of catfish, and — possibly —…

Whole-genome sequencing analysis of tumour and matched non-tumour host tissues of the brown bullhead catfish reveals a type of naturally occurring transmissible cancer.