What is "hemdurgan"

Rosefish \Rose"fish`\, n. (Zo["o]l.) A large marine scorp[ae]noid food fish ( Sebastes marinus) found on the northern coasts of Europe and America. called also red perch, hemdurgan, Norway haddok, and also, erroneously, snapper, bream, and bergylt.

Note: When full grown it is usually bright rose-red or orange-red; the young are usually mottled with red and ducky brown.