Definitions for opahˈoʊ pə
Random House Webster's College Dictionary
a large, deep-bodied, brilliantly colored oceanic food fish
Origin of opah:
opah, moonfish, Lampris regius(noun)
large elliptical brightly colored deep-sea fish of Atlantic and Pacific and Mediterranean
Any of various large, colourful, deep-bodied pelagic fish of the Lampridae family.