# Scientists Discover the First-Ever Contagious Cancer in Fish

> **Newsylist Open Intelligence Dossier** · First detected: 2026-07-22 17:29 UTC · Category: Science · Sources: 2 · Current Velocity: 3.54

## Multi-Source Evidence Table
| Source Outlet | Headline | Published (UTC) | Verification URL |
|---|---|---|---|
| NPR | A strange transmissible cancer is spreading through the catfish in this lake | 2026-07-22 15:00 | [Source Link](https://news.google.com/rss/articles/CBMikwFBVV95cUxNRHBiSWpGOW50YUc4VG5nU1V4RnA2NUdfZ2Nyazc4NXR6dnlTNno2X1dwcVFhYUczclR5c2dsTVJrZUp3ZlQ4TDFxMnVXS3doMWp1QVJwNzBkYnJMWXBMeGJfdzVHRlJJR0d5Mk13bnFwQUNCR0E4RXFMYXh5TllraHdMdW5rMUpYQUR3U0lzRGI5Rkk?oc=5) |
| Science Media Centre España | A transmissible melanoma-type cancer has been discovered in fish, the fourth known contagious tumor among animals | 2026-07-22 15:00 | [Source Link](https://news.google.com/rss/articles/CBMixwFBVV95cUxNRkl4cUZxdnhDT2N5UkFUNEVjejEzdG5hQml2YmRvTzRyLU05Z0xycFFDbFNfamx5YW9RUGxuRU9HeVlOSU1MQVdlWmFFeHQwdWpUV0hPNElaS01sYVdFejFfQ3ZNOWU4eENqc2xQM0hJcl9Db0dkMWp5bHNpSHFrY0t6VkVORGJZYkgyY0ttZEsxYnh6UzdBdzhJZlU1WUpva2dOSFQtZTJpSWhzNjhEa2NBT3B6MXNpTC1kQnhpVEo3dkRTYlBZ?oc=5) |

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*Canonical Source: https://www.newsylist.com/trend/2026-07-22/scientists-discover-the-first-ever-contagious-cancer-in-fish*
*Synthesized by Newsylist Open Intelligence Engine under E-E-A-T journalistic standards.*