13 Mind-Blowing Facts About Oceans. Did You Know There's An IMMORTAL Jellyfish?

1. The Blue Whale, an ocean dweller, is the largest and heaviest animal to EVER exist.

1. The Blue Whale, an ocean dweller, is the largest and heaviest animal to EVER exist.

 1. The Blue Whale, an ocean dweller, is the largest and heaviest animal to EVER exist.