Jellyfish are normally kept in check by fish, which eat small jellyfish and compete for jellyfish food such as zooplankton, researchers said. But, with overfishing, jellyfish numbers are increasing.
These huge creatures can burst through fishing nets, as well as destroy local fisheries with their taste for fish eggs and larvae.
So not only are they chowing down like never before on a fat food supply, but they're cutting into ours. That's so evil! They're already human-sized. How long before they can pilot space ships?!
"(There is) a jellyfish called Nomura, which is the biggest jellyfish in the world. It can weigh 200 kilograms (440 pounds), as big as a sumo wrestler and is 2 meters (6.5 feet) in diameter," Richardson said.
Richardson said jellyfish numbers are increasing in Southeast Asia, the Black Sea, the Gulf of Mexico and the North Sea.
Read more about our soon-to-be invertebrate overlords. Click on that photo to scare yourself silly!