In a disheartening turn of events, the first-ever endangered sawfish to be rescued from a distressing die-off in the Florida Keys has tragically passed away after three weeks of intensive treatment. Despite the dedicated efforts of caretakers at a Sarasota rehabilitation facility, the prehistoric-looking creature succumbed to the mystery ailment that is plaguing many different fish species in the Sunshine State.
Characterized by their long, flattened bodies and distinctive saw-like rostrum (snout), sawfish belong to the Pristidae family. Found in tropical and subtropical coastal waters around the world, these gentle giants primarily feed on small fish and crustaceans. Unfortunately, sawfish populations have experienced significant declines due to overfishing, habitat loss, and accidental capture in fishing gear. As a result, all seven species of sawfish are listed as endangered or critically endangered.
The saga for this particular distressed sawfish started in early April, when the 11-foot male was discovered off Cudjoe Key on the fifth, exhibiting alarming symptoms such as spinning in circles. Prompt intervention from biologists and conservationists led to its rescue and subsequent transfer to the Mote Marine Laboratory & Aquarium, where a team tirelessly worked to save the individual. However, despite their unwavering commitment and round-the-clock care, the sawfish’s condition continued to deteriorate, ultimately leading to the difficult decision to humanely euthanize the creature in accordance with guidance from state and federal wildlife officials. But even though this loss is a devastating blow to the conservation community, Michael Crosby, president and CEO of Mote said the death was sadly not a surprise. Although the sawfish was no longer showing neurological symptoms and was “showing typical behaviors of swimming and resting,” it wasn’t feeding on its own and was being fed through a tube. “These efforts aren’t always successful in fully rehabilitating compromised stranded animals,” Crosby said in a statement. “Sadly, even with our best efforts, the animal was ultimately too compromised to recover.”
The sawfish’s death underscores the severity of the situation not only for the sawfish population but also for the broader marine ecosystem. Since January, the region has witnessed a concerning trend with 45 endangered sawfish fatalities and numerous other species affected by “abnormal fish behavior event,” according to the latest Florida Fish and Wildlife Conservation Commission data. Fish ramming into docks, swimming erratically, and exhibiting other unusual behaviors have raised alarm bells among biologists and conservationists alike.
The investigation into the root cause of this phenomenon has pointed towards harmful algal blooms, with toxins detected in fish tissue samples. However, conclusive evidence is yet to be obtained, highlighting the complexity of environmental challenges and the urgent need for further research and mitigation efforts.
Despite this setback, the commitment to rescuing and rehabilitating endangered species remains unwavering. Federal and state wildlife biologists have pledged to continue rescue efforts, recognizing each intervention as an invaluable learning opportunity. Every rescue provides vital insights into the underlying causes of distress and informs future conservation strategies. As state wildlife veterinarians prepare to conduct an autopsy on the deceased sawfish, they hope the results can lead to crucial clues that could help them understand the underlying causes of the die-off. By dissecting the animal’s remains and analyzing tissue samples, every piece of information gleaned from this postmortem examination represents a potential breakthrough in understanding and combating the conservation crisis. “It’s heartbreaking that the sawfish in rehabilitative care at Mote did not survive,” said Tonya Wiley, team leader of the Smalltooth Sawfish Recovery Team and director of Palmetto-based Havenworth Coastal Conservation. “But we will learn as much as we can from this sawfish and our process to refine our future rescue and care efforts.”
