3. Hag Fish
Hag fish is similar to an eel because of its long slender body but is not similar to an eel. It body can grow up to 4 feet in length and its body release slime which helps it in escaping from the other creatures which captures it for eating. Its slime can expand on combining with water and can produce 20 liters of gelatin by releasing the slime one time. Its slime has the ability of gill blocking because of that reason it has few predators. This animal is also included in the list of top 10 weirdest creatures.