eptatretus vs hagfish

eptatretus and hagfish both are nouns.

Word	Noun	Adjective	Verb	Adverb
eptatretus	Yes	No	No	No
hagfish	Yes	No	No	No

As nouns, hagfish is a hypernym of eptatretus; that is, hagfish is a word with a broader meaning than eptatretus:

eptatretus: a fossil hagfish of the genus Eptatretus
hagfish: eellike cyclostome having a tongue with horny teeth in a round mouth surrounded by eight tentacles; feeds on dead or trapped fishes by boring into their bodies

Other hypernyms of eptatretus include hag, slime eels.

eptatretus (noun)	hagfish (noun)
a fossil hagfish of the genus Eptatretus	eellike cyclostome having a tongue with horny teeth in a round mouth surrounded by eight tentacles; feeds on dead or trapped fishes by boring into their bodies