Kyphosus sectatrix vs sea chub

Kyphosus sectatrix and sea chub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kyphosus sectatrix	Yes	No	No	No
sea chub	Yes	No	No	No

As nouns, sea chub is a hypernym of Kyphosus sectatrix; that is, sea chub is a word with a broader meaning than Kyphosus sectatrix:

Kyphosus sectatrix: food and game fish around Bermuda and Florida; often follow ships
sea chub: schooling fishes mostly of Indian and western Pacific oceans; two species in western Atlantic

Kyphosus sectatrix (noun)	sea chub (noun)
food and game fish around Bermuda and Florida; often follow ships	schooling fishes mostly of Indian and western Pacific oceans; two species in western Atlantic