Then you should probably start learning the type of fish you can commonly find in supermarket. When you are shopping for grocery, head to seafood section there's fish with their name and price shown there. Market like giant, Tesco or Aeon should have listed them in BM & English, if either then Google it.

Also nowadays has website for online ordering fish that Chinese commonly eat like 非洲鱼, 白须公, and etcetera. Chinese restaurants mostly don't list them on menu so you have to ask them to know. It's much more easier to remember the fish you usually eat than just memorize and read about them on the web.