On November 7, 2023, the Lower Keys Guides Association ( LKGA ) and the Bonefish & Tarpon Trust ( BTT ) received the first report of fish in the Florida Keys that exhibited abnormal behavior, colloquially referred to as” the spins.” Fish that spin encounter a loss of balance, which results in them spinning repeatedly in lines, frequently following a difficult or exciting situation. BTT and LKGA have received a total of 57 reports of clinical bass since the original document.
Metal hairstyle, tarpon, force, snook, pinfish, bigeye culex, ballyhoo, jack crevalle, bright jack, blue runner, southern shark, meat fish, mangrove snapper, cubera snapper, leatherjacket, yellowfin mojarra, goliath grouper, blue striped grunt, redfish, lemon shark, Atlantic sharpnose, smalltooth sawfish, and spade
Since November, clinical seafood have been observed constantly, and they are more often seen at night. About 77 percent of information occur between Boogie Channel and Bow Channel in the Lower Keys, which appears to be localized. West of Bow Channel and Key West have lately reported spinning seafood more frequently than ever before. And, north of Biscayne National Park, three reviews of seafood exhibiting these activities have been made in Miami.
An inter-institutional cooperative research study led by BTT and LKGA to determine the origin of these signs first appeared on January 11, 2024. Florida International University’s Fish Ecology Lab ( FIU), University of South Alabama ( USA ), Florida Gulf Coast University ( FGCU), Woods Hole, Florida’s Department of Environmental Protection ( FL DEP), and the Florida Fish and Wildlife Conservation Commission ( FWC ) are among the partners.
Four different examination areas were looked into in this creative study. Among them are contaminants and synthetic substances ( FL DEP, FIU), benthic, harmful algal blooms ( FGCU, WHOI, USA ), and fish health ( FWC).
To collect clinical fish and matched water samples, BTT and LKGA coordinated and coordinated several coordinated sampling events. BTT and LKGA provided lodging for FWC and FGCU staff during these outings. BTT and LKGA have so far collected 40 clinical seafood and 15 samples from surface waters. 132 benthic examples have been collected by FGCU. Following is a summary of studies.
No virus, parasites, or other tissue abnormalities were found in any sampled fish.
Bottom water samples were free of crimson tide, and FL DEP did not find common contaminants.
But, benthic harmful algal blooms samples revealed higher dinoflagellate levels in the genus of gambierdiscus co-existing in areas where acute fish are constantly present.
Gambierdiscus may have negative effects on fish. It produces ciguatoxin, which is bioaccumulate in apes and cause ciguatera poisoning in people.
Ciguatera are more prevalent in coast areas that are typically more stressed out, and what causes them are generally more prevalent. The stress is frequently reflected in coastal cover reduction and algae overgrowth. Fishing of fish and other organisms that eat algae are some examples of anxiety sources, including too many nutrients, warming ocean temperatures caused by climate change, and increased ocean temperatures.
It is unknown at this time whether the presence of acute bass and the presence of high levels of gambierdiscus are what are the causes of these fish’s symptoms.
Additionally, it’s unknown whether this gambierdiscus strain produces any toxic substances, cytotoxins that move up the food chain, or toxic substances that just affect fish through gill absorption.
The results of continuous toxin testing will be used to assess its overall impact and possible effects on fishing.
