Rare Spotted Box Jellyfish

Thought it was the eye of Cthulhu from terraria for a second

It's like several jellyfish fused into one.

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It's one jelly a rare one.

Hey! It's real, wow!!! Per ZME Science
"In 2022, an extremely rare species of box jellyfish was sighted off the coast of Queensland, Australia, by divers who filmed the majestic marine creature. This is only the second time this type of jellyfish has been in front of a camera. The footage is now helping researchers better understand this elusive creature."