Florida Scientist to Discuss Dolphin Dementia Linked to Algal Blooms

Calusa Waterkeeper hosts talk on how toxins from blue-green algae may be causing dementia-like symptoms in stranded dolphins.

Apr. 9, 2026 at 1:14pm

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A highly detailed, translucent X-ray image showing the intricate neural structures of a dolphin's brain, with a faint red glow indicating the presence of a neurotoxin, conceptually illustrating the research into the effects of algal blooms on marine life.An X-ray view into the brain of a stranded dolphin, revealing the potential neurological impacts of harmful algal toxins.Today in Miami

Scientists from the University of Miami are studying whether toxins from blue-green algal blooms are causing dementia-like symptoms in stranded dolphins. Researchers have found high levels of a neurotoxin in the brains of dolphins that stranded during algae bloom season. Experts are also investigating the health risks for humans of breathing in aerosolized toxins from these harmful algal blooms.

Why it matters

Dolphin strandings are a concerning phenomenon that has long puzzled scientists and beachgoers. If the research confirms a link between algal blooms and dolphin dementia, it could have significant implications for marine ecosystem health and public safety, especially in coastal regions prone to frequent harmful algal events.

The details

Scientists from the University of Miami's Rosenstiel School of Marine and Atmospheric Science have been studying samples from stranded dolphins to determine if toxins from blue-green algae, also known as cyanobacteria, are causing neurological damage and dementia-like symptoms. Their research has found elevated levels of a powerful neurotoxin called BMAA in the brains of dolphins that stranded during algal bloom season.

  • The research on dolphin dementia and algal toxins has been ongoing for several years.
  • Calusa Waterkeeper is hosting a talk by the University of Miami scientist on April 9, 2026.

The players

Calusa Waterkeeper

A nonprofit organization focused on protecting the waterways of Southwest Florida.

University of Miami Rosenstiel School of Marine and Atmospheric Science

A leading marine and atmospheric research institution located in Miami, Florida.

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What they’re saying

“We must understand the connection between harmful algal blooms and the health of our marine life, as well as the potential risks to human health from breathing in these toxins.”

— Dr. Leanne Flewelling, Marine Toxicologist, University of Miami

What’s next

The University of Miami scientists plan to present their latest findings on the potential link between algal toxins and dolphin dementia at the upcoming talk hosted by Calusa Waterkeeper. They will also discuss the broader public health implications of harmful algal blooms in coastal regions.

The takeaway

This research highlights the complex and concerning relationship between the health of our waterways, the wellbeing of marine life, and the potential risks to human communities living near algal bloom hotspots. Understanding these connections is crucial for protecting both environmental and public health.