Yes
An opah is one of a variety of large, colourful fish of the faily Lamprididae.
Opah
opah
Opah
opah
Fresh Opah can be found in a variety of locations. The best place to find this is at local fish markets, such as Seattle's fish market. Outside of this option, fresh Opah can be found at specialty grocery stores such as Whole Foods and regular grociers such as Safeway, Kroeger, or Vons.
Fish and chips can be kosher if it`s made with kosher fish in a kosher kitchen. In fact, it was Portuguese Jews who introduced fried fish to England.
Kosher fish have fins and scales. I've attached a related link that provides a comprehensive list of kosher fish.
Fish and chips can be kosher so long as the fish used is a kosher species and the food is prepared in a kosher kitchen with all kosher ingredients.
The signs of a kosher fish are scales and fins. If the fish does not have either of these, then it is not a kosher fish. If it does, it is a kosher fish and one may eat it provided, of course, that it was prepared with kosher ingredients. According to "kashrut.com" (see link in related link section), the Grouper is indeed a kosher fish.
Opah, also known as the sunfish.