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How do hagfishes defend themselves with slime?
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agnathan
Lamprey (Lampetra) on rainbow trout.
Hagfishes, which are primitive vertebrates belonging to the superclass Agnatha, possess a unique defense mechanism to deter predators. Along each side of their body, they have a row of prominent glands that secrete copious amounts of a gelatinous slime when the animal is disturbed. This rapid production of slime is so effective that it has earned them the nickname "slime eels".123