Entry 1 sense Webster, 1913 Redfish /(rĕd"fĭsh`)/ · Red·fish · IPA /rˈɛdfˌɪʃ/ 01 n. The blueback salmon of the North Pacific; -- called also nerka. See Blueback (b). 1. The blueback salmon of the North Pacific; -- called also nerka. See Blueback (b).(Zool.) Also: nerka See: Blueback