The FDA has warned against eating monkfish as it may actually be puffer fish, a fish that has a toxin deadly to humans. The fish as been traced back to, China, again. Consumers should be careful when using products from China as we are finding with alarming regularity, that quality standards are not up to those we expect from vendors. With mislabeling using to deceive consumes, it’s hard to really know what you are getting and avoiding products from China is probably the only safe option at this time.
Read about the warning at the FDA site.