Sanitation Certification Practice Test

What type of toxin is produced by larger fish like amberjack?

1. Ciguatera

2. Scombroid

3. Saxitoxin

4. Domoic acid

The correct answer is: Ciguatera

Ciguatera toxin is produced by certain species of larger fish, including amberjack. This toxin originates from dinoflagellates, which are microscopic marine algae. When smaller fish consume these toxic algae, they accumulate the toxins in their bodies. Larger predator fish like amberjack, which eat the smaller fish, then accumulate higher concentrations of ciguatera through a process known as biomagnification. Ciguatera is particularly concerning for human health because it can cause ciguatera fish poisoning, which leads to various gastrointestinal and neurological symptoms. This is why it's essential for consumers and chefs to be aware of which fish species are known to carry this toxin and to take appropriate precautions. The other toxins mentioned—scombroid, saxitoxin, and domoic acid—are produced through different mechanisms and are associated with different types of fish or seafood. Each of these toxins has a unique source and impact, underscoring the importance of understanding which fish species might pose risks due to toxin accumulation.