Skin cancer spreads between catfish in a freshwater lake

Nature, Published online: 28 July 2026; doi:10.1038/d41586-026-02287-wThe discovery of a transmissible melanoma in a freshwater catfish raises questions about the disease’s origin, mode of transmission and broader impact on the species.

Nature, Published online: 28 July 2026; doi:10.1038/d41586-026-02287-w

The discovery of a transmissible melanoma in a freshwater catfish raises questions about the disease’s origin, mode of transmission and broader impact on the species.