hagfish

n. jawless marine fish that looks like an eel

Hagfish are marine craniates of the class Myxini, also known as Hyperotreti. Despite their name, there is some debate about whether they are strictly fish (as there is for lampreys), since they belong to a much more primitive lineage than any other group that is commonly defined fish (Chondrichthyes and Osteichthyes). Their unusual feeding habits and slime-producing capabilities have led members of the scientific and popular media to dub the hagfish as the most "disgusting" of all sea creatures.[1][2][3]
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Noun
1. 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
(synonym) hag, slime eels
(hypernym) jawless vertebrate, jawless fish, agnathan
(hyponym) Myxine glutinosa
(member-holonym) Myxinidae, family Myxinidae

hagfish /'hægfiʃ/
danh từ (động vật học) cá mút đá myxin ((cũng) hag)
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MISSINOIDE