Has fish a higher risk compared to other products? To my knowledge the food product with highest fraud rate is oil. After that things like honey, and further down we have beef. I have never heard of report in regard to fish, but feel free to point me to such reports.
https://www.seattletimes.com/seattle-news/politics/puget-sou...
I'm glad to see that parts of the government, specifically one of our US Senators, Maria Cantwell, and some folks in Washington state's legislature, like Kevin Ranker from Orcas Island, are doing the right thing on this issue. Cantwell, being in the minority party in the Senate, can't do much more than angrily issue press releases, and Ranker, being in the majority party in the Washington state Senate, is doing as much as he can—i.e. introduce legislation.
https://www.facebook.com/senatorcantwell/posts/1994659154144...
https://www.seattletimes.com/seattle-news/politics/puget-sou...
Edit: Apparently, cod may be farmed (1), though I think the idea still stands.
1: https://thefishsite.com/articles/cultured-aquatic-species-at...
"Wild-caught" claims are only as reliable as the least honest entity in the supply chain.