So we all know the Hagfish as a disgusting relic of the Devonian era. They are basically the critters who will consume your mortal remains should you be unfortunate enough to perish at sea.
But there are other deep water critters who also vie for that honor as your mortal remains sitting down at 2000 feet represent a veritable cornucopia in the desert like environment of the cold dark deep.
To combat this underwater arms race and to not become part of the movable feast, Hagfish have developed a unique slime that until very recently researchers didn't know a lot about.
The following video aptly reveals the Hagfish defense mechanism when a deep water shark shows up and thinks it will make an easy meal of the eel like critter it has just discovered at a research bait station.
Great stuff and kudos to the team behind the video from Australia: