Giant Jellyfish Invaders

This sounds like something out of a 1950's comic book but unfortunately it's not. Growing up to 6.5 feet and weighing as much as 450 pounds these monster size creatures are threatening to take over the oceans.

From ABC News (Australia)...

Giant jellyfish are taking over parts of the world's oceans due to overfishing and other human activities, researchers say.

Jellyfish are normally kept in check by fish, which eat small jellyfish and compete for jellyfish food such as zooplankton, he says.

But with overfishing, jellyfish numbers are increasing. Jellyfish feed on fish eggs and larvae, further impacting on fish numbers.

The researchers say climate change may also encourage more jellyfish and they have postulated for the first time that these conditions can lead to what they call a "jellyfish stable state", in which jellyfish rule the oceans.

There goes that vacation at the beach!