Jelly fish tanks, how cool are these.

[dany2010]

Just stumbled on these somewhere.

 

 

Mega expensive but look so cool.

[ChrisH]

They don't live very long though unfortunately.

[dhicks]

Mega expensive but look so cool.

 

You can cheat somewhat and get glass jellyfish. Still expensive to set up (they are genuine, hand-crafted, finely-detailed works of art), but don't take as much care and feeding.

[laserblazer]

Put some clingfilm in a goldfish bowl.