So, I got an upsidedown jelly to teach the kiddies about everyone's favorite deadly invertebrates, the true jellies. Hoo boy, venom in the classroom! But, Jellyfish like to die in pumps or get killed in other horrific ways. And for just one animal I didn't want to set up a separate tank. So... I made him a CAGE! But no one else has done this that I can find. Is this a bad idea? Why or why not?? Help! The cage is the plastic lid off a water quality test kit, with the holes melted out using a metal poker, so there are no hard edges. The lip of the plastic lid is buried in the rocks to keep other animals from lifting it up and investigating. For some reason, this image is displaying upsidedown, despite uploading it rightsideup. Ironic. It seems to like the waterflow, I've got it right next to a pump so there's good flow through.