Hagfish: The Jawless "Slime Eel"
This eel-like creature is an anatomical anomaly. It's the only known living animal that lacks a backbone and jaw but still has a skull. Hagfish secrete a goo when attacked that expands when combined with water. The predator is then choked by the expanded goo.
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from Epic Wildlife
Key Facts In This Video
The hagfish is the only known living animal with a skull but no spine. (0:20)
The hagfish does not have a jaw, but rather tooth-like projections. (0:42)
The hagfish secretes a micro-fiber slime that expands when combined with water and chokes its attackers. (0:59)