That's the lion's mane jellyfish, which lives in the ocean and can apparently devour cities whole. I had no fucking idea this existed. COMPLETELY CHANGES THE GAME. I'm never going in the ocean again. Ever. I'm afraid to even take a goddamn bath now, lest this thing ooze out of the pipes and eats my goddamn house. This thing is the Unicron of the deep.

[The Week]