The firework jellyfish is rarely seen by humans, but its bioluminescence could put any July 4th show to shame.

Soft copper wire : 20 gauge ( wire diameter 0.8mm ) : cut the segments 1.5cm ( 0.6 inch) , 3cm ( 1.2 inch), 4cm ( 1.6 inch), ...

You can use any wire you have. Large diameter wire will be more difficult to manipulate, but will increase the rigidity of ...