Endangered smalltooth sawfish populations in Florida are experiencing both recovery and setbacks, according to recent research. During the winters of 2024 and 2025, widespread "spinning fish" events swept through the Florida Keys, impacting more than 80 marine fish species and likely killing hundreds of endangered large juvenile and adult smalltooth sawfish. The mysterious phenomenon caused fish to swim in tight circles, lose balance and sometimes die.
The spinning events likely resulted from environmental stressors or neurotoxins from algae, highlighting the ongoing vulnerability of marine ecosystems in Florida waters. Smalltooth sawfish, scientifically known as Pristis pectinata, represent one of the most critically endangered marine species in U.S. waters. These large rays, which can grow over 16 feet long, have suffered severe population declines due to habitat loss and fishing pressure.
Despite these recent die-offs, some historical nursery areas in Florida are showing signs of sawfish recovery. The species has been protected under the Endangered Species Act, and conservation efforts have focused on identifying and protecting critical habitat areas. Florida's waters serve as the primary remaining habitat for smalltooth sawfish in the United States.
The contrasting trends of recovery in nursery areas versus mass mortality events underscore the complex challenges facing marine conservation. Researchers continue investigating the causes of spinning fish events to prevent future occurrences. The sawfish's fate may serve as an indicator of broader ecosystem health in Florida's coastal waters.