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Ciguatera fish poisoning (CFP) is the most common reported illness caused by marine biotoxin in food. It is caused by eating fish that have accumulated ciguatoxins (CTXs) due to feeding on toxic microalgae (Gambierdiscus spp. and Fukuyoa spp.)

Marine biotoxins are naturally occurring chemicals caused by certain types of toxic algae. Exposure to marine biotoxins can occur through direct contact by swimming, breathing in aerosolised toxins in water droplets or eating toxin-contaminated seafood.