eptatretus vs slime eels

eptatretus and slime eels both are nouns.

Word	Noun	Adjective	Verb	Adverb
eptatretus	Yes	No	No	No
slime eels	Yes	No	No	No

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

eptatretus: a fossil hagfish of the genus Eptatretus
slime eels: 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, hagfish.

eptatretus (noun)	slime eels (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