Yes, scientists have been breeding jellyfish in space.

they should launch some of those at china. they've got a serious hornet problem.

"Basically, the invertebrates had vertigo. (Or, as PopSci puts it: "As cool as being an astronaut baby sounds, the jellies didn't develop the same gravity-sensing capabilities as their Earthly relatives.")" - mebbe i was born in microgravity, too!