Brown bullhead catfish melanoma represents a novel transmissible cancer.

Since 2012, brown bullhead catfish (Ameiurus nebulosus) in a lake that spans Vermont, USA, and Quebec, Canada, have shown a high rate of melanomas, suggesting a causal contaminant or contagion 1 .

Since 2012, brown bullhead catfish (Ameiurus nebulosus) in a lake that spans Vermont, USA, and Quebec, Canada, have shown a high rate of melanomas, suggesting a causal contaminant or contagion 1 . We tested the hypothesis that this affliction represents a clonally transmissible…