Ciguatera poisoning is caused by a toxin found in certain large predatory reef fish. Which fish is a common source?
a.Barracuda and large grouper
b.Atlantic salmon raised on farms
c.Canned sardines in olive oil
d.Farm-raised tilapia and catfish
Explanation
Ciguatera toxin builds up through the reef food chain and concentrates in large predatory reef fish such as barracuda, amberjack, and large grouper; it cannot be destroyed by cooking or freezing, so buying from approved, reputable suppliers is the only control. Farmed Atlantic salmon and farm-raised tilapia or catfish never feed on a tropical reef, and canned sardines are small plankton feeders that are heat-processed — none of them is a ciguatera source.
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