dorado

Concise Oxford English Dictionary © 2008 Oxford University Press:
dorado /dəˈrɑːdəʊ/

▶noun (pl. dorados)

• 1 a large edible fish of warm seas, with silver and bright blue or green coloration. [Coryphaena hippurus.]

• 2 a South American freshwater game fish with a golden body and red fins. [Salminus maxillosus.]

– origin C17: from Sp., lit. ‘gilded’.