If u no nething about or similer 2 this jellyfish plz replie i'de like 2 see ur take on this.

Well, I know that some jellyfish tentacles can grow pretty long, like as long as a bus, but the body? I don't think so. And as for that picture you posted, it looks to me like a simple depth perception picture. The jellyfish is closer to the camera than the diver, so it makes the jellyfish look BIGGER than the diver. That's my opinion, however.