Gestrandete Delfine zeigen Anzeichen von Alzheimer aufgrund verschmutzter Gewässer: Gestrandete Delfine zeigten Hirnschäden, die denen von Menschen mit Alzheimer unheimlich ähnlich waren. So wie Menschen mit Demenz manchmal weit von zu Hause wegwandern, glauben Wissenschaftler, dass Delfine mit Alzheimer auf See verwirrt werden könnten.

I’ve linked to the news release in the post above. In this comment, for those interested, here’s the link to the peer reviewed journal article:

https://www.nature.com/articles/s42003-025-08796-0

From the linked article:

**Beached dolphins show signs of Alzheimer’s due to polluted waters**

Now, a new study has doubled down on the discovery, revealing **stranded dolphins showed brain damage eerily similar to that of people with Alzheimer’s. Just as people with dementia sometimes wander far from home, scientists think dolphins with Alzheimer’s might get confused at sea**. It’s the strongest evidence yet that neurodegeneration isn’t just a human affliction; it may ripple through the animal kingdom, too.

But perhaps most significantly, these changes may be linked to cyanobacteria, toxic microbes often found in polluted waters.

In Florida’s Indian River Lagoon (IRL), climate change and pollution fuel toxic algal blooms. These blooms release toxins that accumulate in the food chain, posing a threat to fish, land animals, and even humans. Dolphins, being long-lived and highly exposed, can serve as nature’s early warning system. Their brains and bodies reveal what chronic toxin exposure might mean for all of us.