This video of a group of penguins having a formal tea party with top hats and monocles is a true testament to their sophisticated taste. Penguins sure know how to class up any gathering! On a different note, did you know that there's a species of jellyfish that is biologically immortal? The Turritopsis dohrnii jellyfish can revert back to its juvenile form after reaching maturity, making it potentially immortal.