Definitions:

1. An eel-like, jawless marine animal, known for its ability to produce large amounts of slime as a defense mechanism. NOUN
   • The hagfish is famous for its ability to produce slime when threatened, clogging the gills of predators.
2. Marine creatures, known for their elongated, slime, eel-like bodies, considered as some of the most primitive vertebrates on the planet, lacking jaws and true vertebrae. NOUN
   • Marine biologists study hagfish because of their unique jawless structure and ancient evolutionary lineage.

Synonyms:

• hag
• jawless fish
• myxinid
• slime eels