Is The Secret to Eternal Life Found in Jellyfish?

For centuries, man has been on a quest to find the elixir to eternal life. Alchemists struggled fruitlessly to create the legendary philosopher's stone, a mythical substance capable of turning base metals into precious gold and said to hold the key to immortality.
But perhaps they were going about it the wrong way. Instead of searching for answers on land, maybe they should have been looking to the sea.