Lota lota vs codfish

Lota lota and codfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lota lota	Yes	No	No	No
codfish	Yes	No	No	No

As nouns, codfish is a hypernym of Lota lota; that is, codfish is a word with a broader meaning than Lota lota:

Lota lota: elongate freshwater cod of northern Europe and Asia and North America having barbels around its mouth
codfish: major food fish of Arctic and cold-temperate waters

Other hypernyms of Lota lota include cod.

Lota lota (noun)	codfish (noun)
elongate freshwater cod of northern Europe and Asia and North America having barbels around its mouth	major food fish of Arctic and cold-temperate waters
	lean white flesh of important North Atlantic food fish; usually baked or poached