In this episode of the How to Protect the Ocean podcast, host Andrew Lewin discusses the recent phenomenon of sawfish displaying unusual behavior in Florida waters, leading to their deaths. While scientists have identified the behavior and its effects, the underlying cause remains uncertain. Andrew shares his personal experiences from a beautiful weekend in North Bay, reflecting on the warmer-than-usual September weather and its implications. Tune in to learn more about this intriguing issue affecting ocean life and stay informed on how to advocate for a healthier ocean. Link to article: https://www.nationalgeographic.com/animals/article/why-fish-are-spinning-to-death-florida?utm_source=flipboard&utm_content=NationalGeographic%2Fmagazine%2FAnimals&rnd=1726101324911&loggedout=true Follow a career in conservation: https://www.conservation-careers.com/online-training/ Use the code SUFB to get 33% off courses and the careers program.   Do you want to join my Ocean Community? Sign Up for Updates on the process: www.speakupforblue.com/oceanapp   Sign up for our Newsletter: http://www.speakupforblue.com/newsletter   Facebook Group: https://bit.ly/3NmYvsI Connect with Speak Up For Blue: Website: https://bit.ly/3fOF3Wf Instagram: https://bit.ly/3rIaJSG TikTok: https://www.tiktok.com/@speakupforblue Twitter: https://bit.ly/3rHZxpc YouTube: www.speakupforblue.com/youtube Scientists have recently made significant strides in understanding the alarming phenomenon of sawfish and other fish exhibiting spinning behavior and subsequently dying in Florida waters. This unusual behavior, observed during the summer, raised concerns among marine biologists and conservationists, particularly because sawfish are already classified as an endangered species. Identification of Toxins Through extensive investigation, researchers discovered that the symptomatic fish had died due to exposure to multiple toxins believed to originate from various species of dinoflagellates, a type of microscopic algae. Under normal conditions, these dinoflagellates reside on seagrass or larger algae on the seafloor. However, an unknown trigger—potentially heat, a storm, or a combination of environmental factors—caused these dinoflagellates to detach from their usual habitats and enter the water column. The Role of Dinoflagellates The specific dinoflagellates identified in this case belong to the genus Gambierdiscus, known for producing a neurotoxin called ciguatoxin. This toxin can lead to ciguatera, a condition in humans characterized by symptoms such as vomiting, nausea, and neurological issues. While researchers were initially concerned about the implications for human health, they found no significant cases of ciguatera reported among those consuming fish from the affected areas. Mechanism of Toxic Exposure Sawfish, which typically inhabit the ocean floor, may have been particularly vulnerable to these toxins. As they swim along the bottom, they use their saw-like rostrum to sift through sediment, potentially disturbing the dinoflagellates and allowing the toxins to enter their gills and accumulate in their livers. This accumulation of toxins likely led to the neurological impacts observed, resulting in the spinning behavior before death. Ongoing Research and Future Implications Despite identifying the presence of multiple toxins and their likely sources, the exact cause of the spinning phenomenon remains unclear. Researchers are still investigating the environmental conditions that led to the dinoflagellates' unusual behavior and the subsequent impact on fish populations. This situation underscores the need for further research to understand the dynamics of harmful algal blooms and their effects on marine life. In response to the crisis, scientists initiated an emergency rescue effort for the critically endangered sawfish in spring 2024. Although the first rescued individual did not survive, the