Hagfish, a.k.a slime eels are repulsive creatures. They have slime glands on both sides of their body. When a predator bites them or touches them, they release a protein that mixes with the salt water and expands. This causes their attacker to choke, possibly to death. Hagfish have been around before dinosaurs ! Meaning, they are one of the oldest creatures on earth! That’s impressive for a nasty sea worm-like creature . If I saw one I’d try to take it and put into a plastic box full of water so I could examine it. Thanks for taking time and reading my article.