ˈräkliŋ noun
( plural rocklings also rockling )
Etymology: rock (IV) + ling
1. : any of several small rather elongate marine cods (family Gadidae) ; especially : a fish ( Gadus mustela or Motella mustela ) that is common in tide pools along European coasts and has four barbels on the snout and one beneath the chin — called also five-bearded rockling
2. : an Australian and New Zealand fish (genus Genypterus ) of the family Ophidiidae