Seafood mislabelling is caused by eating certain reef fishes whose flesh is contaminated with toxins. The CDC states the following about Ciguatera: Ciguatera fish poisoning (or ciguatera) is an illness caused by eating fish that contain toxins produced by a marine microalgae called "Gambierdiscus toxicus". People who have ciguatera may experience nausea, vomiting, and neurologic symptoms such as tingling fingers or toes. They also may find that cold things feel hot and hot things feel cold. Ciguatera has no cure. Symptoms usually go away in days or weeks but can last for years. Because the toxins are very heat-resistant, consumers cannot protect
Alaria (trematode) haemorrhage which can lead to clinical disease. Paratenic hosts also become infected when eating the contaminated intermediate host, either tadpoles or frogs. The mesocercariae remain in organs such as the muscles, connective tissue or lungs, and eyes. They are mostly harmless in dogs as well as the paratenic hosts. However, prevalence of "Alaria" in dogs in the United States and foxes in Germany are up to 30%. Unfortunately for humans, it can be quite harmful and even cause death. Humans can be infected by ingesting "Alaria" larvae, which can be from eating undercooked frog legs or contaminated boar or pig