In the US many sushi places sell "white tuna" which actually isn't a Tuna at all but Escolar, a fish from a different family and genus. That seems to be primarily a popular marketing ploy: Tuna is substantially more expensive than Escolar. It also doesn't remotely taste like tuna either. The practice is akin to selling chicken as "white beef" at beef prices.
Is is not only is it grossly misleading, it is also potentially dangerous. Escolar is banned in (for example) Japan and Italy because they consider it toxic. Being banned in Japan is particularly ironic for a Sushi fish. Anyway: Tuna is much less of a health risk than Escolar.
- Is this legal or what is the legal interpretation of this mislabeling?
- What legal recourse does a customer have if they come across it?
If locality matters, let's start with US, Massachusetts.