The difference between Redfish and Roughy
When used as nouns, redfish means sebastes spp., the edible, whereas roughy means the orange roughy, .
check bellow for the other definitions of Redfish and Roughy
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Redfish as a noun:
Any of several fish with red skin or flesh Sebastes spp., the edible # especially Sebastes norvegicus, found in North American waters, also called rosefish or . A large red edible fish, , also called or red drum. Lutjanus spp., snappers. , , , A slimehead, of family Oncorhynchus nerka (sockeye salmon)
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Roughy as a noun (Australia):
A fish in family The orange roughy, . Any of several marine fish of the related genus , which have rough and spiny scales.