1 in 5 fish sold is mislabeled, according to Oceana, which recently tested over 25,000 samples of seafood, and relied on 200 studies in 55 countries. 58% of samples that were found to be fraudulent could potentially cause health issues. Furthermore, Oceana found that not only is human health at risk because of this large-scale fraud. Endangered species of fish were found mislabeled as a more prevalent fish. In Brazil, for example, the critically endangered largetooth sawfish was labeled as shark.