Opium fish? It's basically only in the restaurant world...?
Scientific name: turbot
There are nearly 20 varieties of turbot, and we usually see its name on dishes, such as: opium fish head.
In fact, the ingredients of these dishes are all from this family.
The aliases of the raw materials of its dishes: toothfish, partial mouth, butterfly fish, Ya film fish, flounder fish, left mouth, flounder, opium fish, earth fish.
You can look at this introduction: .yahoo.com/question/1406112402576.html
But the upstairs introduction of turbot information is not a problem, I'm just saying that in the breeding is generally not called opium.